{"id":147356,"date":"2026-04-08T13:40:42","date_gmt":"2026-04-08T18:40:42","guid":{"rendered":"https:\/\/engineswapdepot.com\/?p=147356"},"modified":"2026-04-08T13:40:42","modified_gmt":"2026-04-08T18:40:42","slug":"1978-pontiac-trans-am-with-a-ls3-v8","status":"publish","type":"post","link":"https:\/\/engineswapdepot.com\/?p=147356","title":{"rendered":"1978 Pontiac Trans Am with a LS3 V8"},"content":{"rendered":"<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147361\" rel=\"attachment wp-att-147361\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147361\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147361\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773742229&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 01\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?resize=600%2C338&#038;ssl=1\" alt=\"silver 1978 Pontiac Trans Am with a LS3 V8\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147361\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/v8speedshop.com\">V8 Speed &#038; Resto<\/a> in Red Bud, Illinois was tasked with upgrading the performance in this 1978 Pontiac Firebird Trans Am. The company performed an engine swap and paired that with a modern drivetrain and suspension.<\/p>\n<p><iframe loading=\"lazy\" width=\"600\" height=\"338\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/jJlCI2InNmc?si=puSxfZorlzUx4_HR\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147362\" rel=\"attachment wp-att-147362\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147362\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147362\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773742204&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 02\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?resize=600%2C338&#038;ssl=1\" alt=\"silver 1978 Pontiac Trans Am with a LS3 V8\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147362\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-02.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147364\" rel=\"attachment wp-att-147364\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147364\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147364\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773742105&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 04\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?resize=600%2C338&#038;ssl=1\" alt=\"rear view of a front of a silver 1978 Pontiac Trans Am\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147364\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-04.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>The Trans Am&#8217;s new heart is a 6.2 L LS3 V8 crate motor capable of 525 hp (386 kW) and 486 lb-ft (658 Nm) of torque. The motor features a nodular iron crank, aluminum pistons, L92-style heads, and Holley mid-mount accessory kit. A set of Hooker cast iron manifolds route exhaust through stainless steel tubing. Behind the motor is a 4L70 four-speed automatic transmission and 10-bolt rear end with a limited-slip differential.<\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147365\" rel=\"attachment wp-att-147365\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147365\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147365\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05.jpg?fit=2048%2C1536&amp;ssl=1\" data-orig-size=\"2048,1536\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;2.4&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone 14 Plus&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1772652358&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;1.54&quot;,&quot;iso&quot;:&quot;1600&quot;,&quot;shutter_speed&quot;:&quot;0.025&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 05\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05.jpg?fit=1200%2C900&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05-600x450.jpg?resize=600%2C450&#038;ssl=1\" alt=\"1978 Pontiac Trans Am hood open showing LS3 V8\" width=\"600\" height=\"450\" class=\"alignnone size-medium wp-image-147365\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05.jpg?resize=600%2C450&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05.jpg?resize=1200%2C900&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05.jpg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05.jpg?resize=1536%2C1152&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-05.jpg?w=2048&amp;ssl=1 2048w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147366\" rel=\"attachment wp-att-147366\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147366\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147366\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773741848&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 06\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?resize=600%2C338&#038;ssl=1\" alt=\"1978 Pontiac Trans Am hood open showing LS3 V8\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147366\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-06.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147370\" rel=\"attachment wp-att-147370\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147370\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147370\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?fit=2400%2C1800&amp;ssl=1\" data-orig-size=\"2400,1800\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone 14 Plus&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1762957126&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;5.7&quot;,&quot;iso&quot;:&quot;40&quot;,&quot;shutter_speed&quot;:&quot;0.076923076923077&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 10\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?fit=1200%2C900&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10-600x450.jpg?resize=600%2C450&#038;ssl=1\" alt=\"10-bolt rear end in a 1978 Pontiac Trans Am\" width=\"600\" height=\"450\" class=\"alignnone size-medium wp-image-147370\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?resize=600%2C450&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?resize=1200%2C900&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?resize=1536%2C1152&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?resize=2048%2C1536&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-10.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147371\" rel=\"attachment wp-att-147371\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147371\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147371\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?fit=2400%2C1800&amp;ssl=1\" data-orig-size=\"2400,1800\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone 14 Plus&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1752245410&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;5.7&quot;,&quot;iso&quot;:&quot;50&quot;,&quot;shutter_speed&quot;:&quot;0.066666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 11\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?fit=1200%2C900&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11-600x450.jpg?resize=600%2C450&#038;ssl=1\" alt=\"limited-slip differential in a 10-bolt rear end in a 1978 Pontiac Trans Am\" width=\"600\" height=\"450\" class=\"alignnone size-medium wp-image-147371\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?resize=600%2C450&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?resize=1200%2C900&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?resize=1536%2C1152&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?resize=2048%2C1536&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-11.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>V8 Speed &#038; Resto improved the car&#8217;s handling with Global West control arms and coilovers and a Borgeson power steering box. Between the subframes are Global West connectors. The rear suspension features Detroit Speed leaf-springs. They replaced the factory brakes with Wilwood six-piston calipers with 12-inch drilled\/slotted rotors on each corner.<\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147369\" rel=\"attachment wp-att-147369\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147369\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147369\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773741957&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 09\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?resize=600%2C338&#038;ssl=1\" alt=\"Global West control arms and coilover on a 1978 Pontiac Trans Am\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147369\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-09.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147372\" rel=\"attachment wp-att-147372\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147372\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147372\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?fit=2400%2C1800&amp;ssl=1\" data-orig-size=\"2400,1800\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 12\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?fit=1200%2C900&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12-600x450.jpg?resize=600%2C450&#038;ssl=1\" alt=\"Wilwood six-piston caliper and 12-inch rotor on a 1978 Pontiac Trans Am\" width=\"600\" height=\"450\" class=\"alignnone size-medium wp-image-147372\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?resize=600%2C450&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?resize=1200%2C900&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?resize=1536%2C1152&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?resize=2048%2C1536&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-12.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>Covering the brakes are a set of YearOne Snowflake-style 17&#215;9-inch wheels wearing Nitto tires. V8 Speed &#038; Resto sells an adapter called the &#8220;Shaker Maker&#8221; which retains the Shaker hood scoop with a LSx V8.<\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147367\" rel=\"attachment wp-att-147367\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147367\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147367\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773741934&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 07\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?resize=600%2C338&#038;ssl=1\" alt=\"YearOne Snowflake-style 17x9-inch wheels\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147367\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-07.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>V8 Speed &#038; Resto retained the red interior but added a Vintage Air AC system to keep the occupants comfortable. The 4L70 transmission is controlled by a Shiftworks shifter while Dakota Digital RTX gauges display information from the LS3 V8. <\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147373\" rel=\"attachment wp-att-147373\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147373\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147373\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773741945&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 13\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?resize=600%2C338&#038;ssl=1\" alt=\"red interior in a 1978 Pontiac Trans Am\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147373\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-13.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147375\" rel=\"attachment wp-att-147375\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147375\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147375\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773742175&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 15\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?resize=600%2C338&#038;ssl=1\" alt=\"Dakota Digital RTX gauges in a 1978 Pontiac Trans Am\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147375\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-15.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/engineswapdepot.com\/?attachment_id=147374\" rel=\"attachment wp-att-147374\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"147374\" data-permalink=\"https:\/\/engineswapdepot.com\/?attachment_id=147374\" data-orig-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?fit=2400%2C1350&amp;ssl=1\" data-orig-size=\"2400,1350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1773742085&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"1978 Pontiac Trans Am with a LS3 V8 and 4L70 14\" data-image-description=\"&lt;p&gt;1978 Pontiac Trans Am with a LS3 V8 and 4L70E&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?fit=1200%2C675&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?resize=600%2C338&#038;ssl=1\" alt=\"red seats in a 1978 Pontiac Trans Am\" width=\"600\" height=\"338\" class=\"alignnone size-medium wp-image-147374\" srcset=\"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?resize=600%2C338&amp;ssl=1 600w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?resize=1200%2C675&amp;ssl=1 1200w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?resize=2048%2C1152&amp;ssl=1 2048w, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-14.jpg?w=2400&amp;ssl=1 2400w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>Source: <a href=\"https:\/\/v8speedshop.com\/1978-pontiac-trans-am-tl\/\">V8 Speed &#038; Resto<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>V8 Speed &#038; Resto in Red Bud, Illinois was tasked with upgrading the performance in this 1978 Pontiac Firebird Trans Am. The company performed an engine swap and paired that with a modern drivetrain and suspension. The Trans Am&#8217;s new heart is a 6.2 L LS3 V8 crate motor capable of 525 hp (386 kW)&hellip;&nbsp;<a href=\"https:\/\/engineswapdepot.com\/?p=147356\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">1978 Pontiac Trans Am with a LS3 V8<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":147361,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":100,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[177],"tags":[],"class_list":["post-147356","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-firebird"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/04\/1978-Pontiac-Trans-Am-with-a-LS3-V8-and-4L70-01.jpg?fit=2400%2C1350&ssl=1","jetpack-related-posts":[{"id":114858,"url":"https:\/\/engineswapdepot.com\/?p=114858","url_meta":{"origin":147356,"position":0},"title":"Pontiac Trans Am with a 690 whp 468 ci V8","author":"swaptastic","date":"May 1, 2024","format":false,"excerpt":"Vengeance Racing was tasked with upgrading this fourth-generation Pontiac Trans Am for road racing. Under the hood they installed a 468 ci (7.6L) LSx V8 built by Late Model Engines sitting on a UMI Performance F-Body Road Race K-member. The motor features forged internals, Brodix BS7 ported six-bolt heads, LME\u2026","rel":"","context":"In &quot;Firebird&quot;","block_context":{"text":"Firebird","link":"https:\/\/engineswapdepot.com\/?cat=177"},"img":{"alt_text":"Pontiac Firebird Trans Am with a 468 ci LSx V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/04\/Pontiac-Firebird-Trans-Am-with-a-468-ci-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/04\/Pontiac-Firebird-Trans-Am-with-a-468-ci-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/04\/Pontiac-Firebird-Trans-Am-with-a-468-ci-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/04\/Pontiac-Firebird-Trans-Am-with-a-468-ci-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/04\/Pontiac-Firebird-Trans-Am-with-a-468-ci-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":116558,"url":"https:\/\/engineswapdepot.com\/?p=116558","url_meta":{"origin":147356,"position":1},"title":"1969 Firebird with a 1400 hp Twin-Turbo 482 ci Pontiac V8","author":"swaptastic","date":"June 5, 2024","format":false,"excerpt":"Troy Gudgel and his company BBT Fabrications in Mahomet, Illinois invested many hours building Brad Sather's 1969 Pontiac Firebird. In the engine bay is a twin-turbo 482 ci Pontiac V8 built by Butler Performance in Lawrenceburg, Tennessee sitting six inches further back. The all-aluminum motor features an IA-II block, forged\u2026","rel":"","context":"In &quot;Firebird&quot;","block_context":{"text":"Firebird","link":"https:\/\/engineswapdepot.com\/?cat=177"},"img":{"alt_text":"1969 Firebird with a twin-turbo Pontiac V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/06\/1969-Firebird-with-a-twin-turbo-Pontiac-V8-01.jpg?fit=813%2C655&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/06\/1969-Firebird-with-a-twin-turbo-Pontiac-V8-01.jpg?fit=813%2C655&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/06\/1969-Firebird-with-a-twin-turbo-Pontiac-V8-01.jpg?fit=813%2C655&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/06\/1969-Firebird-with-a-twin-turbo-Pontiac-V8-01.jpg?fit=813%2C655&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":108209,"url":"https:\/\/engineswapdepot.com\/?p=108209","url_meta":{"origin":147356,"position":2},"title":"Pontiac Firebird with a LS7 V8","author":"swaptastic","date":"November 29, 2023","format":false,"excerpt":"Hawks Motorsports rebuilt this third-gen Pontiac Firebird as a Stage 2 Firehawk at their company in Easley, South Carolina. Under the custom carbon fiber hood they swapped a 7.0 L LS7 V8 featuring Mamo ported heads, Hawks Motorsport camshaft, longtube headers, and custom stainless steel exhaust. The naturally aspirated motor\u2026","rel":"","context":"In &quot;Firebird&quot;","block_context":{"text":"Firebird","link":"https:\/\/engineswapdepot.com\/?cat=177"},"img":{"alt_text":"Pontiac Firebird with a LS7 V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=772%2C514&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=772%2C514&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=772%2C514&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=772%2C514&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":120485,"url":"https:\/\/engineswapdepot.com\/?p=120485","url_meta":{"origin":147356,"position":3},"title":"1971 Firebird with a LS7 V8","author":"swaptastic","date":"September 6, 2024","format":false,"excerpt":"Deb Hall sent a 1971 Pontiac Firebird to Detroit Speed for a transformation. The company logged many hours working on the appearance and upgrading performance. The result is a pro-touring showpiece. The company started by installing new steel quarter-panels, fenders, radiator core support and carbon fiber nose, hood, and trunk\u2026","rel":"","context":"In &quot;Firebird&quot;","block_context":{"text":"Firebird","link":"https:\/\/engineswapdepot.com\/?cat=177"},"img":{"alt_text":"1971 Pontiac Firebird with a LS7 V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/09\/1971-Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/09\/1971-Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/09\/1971-Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/09\/1971-Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/09\/1971-Pontiac-Firebird-with-a-LS7-V8-01.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":108002,"url":"https:\/\/engineswapdepot.com\/?p=108002","url_meta":{"origin":147356,"position":4},"title":"Pontiac Trans Am Race Car with a Mid-Engine Twin-Turbo LSR V8","author":"swaptastic","date":"November 23, 2023","format":false,"excerpt":"The father and son team at Horizon Motorsports spent 15,000 hours creating \"Hammerhead\" 1973 Pontiac Trans Am for time attack racing. Sitting nearly 28 inches back is an all-aluminum LSR V8 built by Late Model Engines capable of 2,000 horsepower. A pair of Garrett G35-900 turbochargers in the back of\u2026","rel":"","context":"In &quot;Firebird&quot;","block_context":{"text":"Firebird","link":"https:\/\/engineswapdepot.com\/?cat=177"},"img":{"alt_text":"1973 Pontiac Trans Am with a Mid-Engine Twin-Turbo LSR V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1973-Pontiac-Trans-Am-with-a-Mid-Engine-Twin-Turbo-LSR-V8-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1973-Pontiac-Trans-Am-with-a-Mid-Engine-Twin-Turbo-LSR-V8-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1973-Pontiac-Trans-Am-with-a-Mid-Engine-Twin-Turbo-LSR-V8-01.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1973-Pontiac-Trans-Am-with-a-Mid-Engine-Twin-Turbo-LSR-V8-01.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1973-Pontiac-Trans-Am-with-a-Mid-Engine-Twin-Turbo-LSR-V8-01.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":141822,"url":"https:\/\/engineswapdepot.com\/?p=141822","url_meta":{"origin":147356,"position":5},"title":"1980 Trans Am with a ProCharged 6.7 L V8","author":"swaptastic","date":"December 5, 2025","format":false,"excerpt":"Johnson's Hot Rod Shop spent 10 weeks transforming this 1980 Trans Am Pace Car at their company in Gadsden, Alabama. Power is generated by a supercharged 6.7L LS1 V8 built by Automotive Specialists running on a Holley Dominator ECU. The motor features a ProCharger P-1X supercharger and their new water-to-air\u2026","rel":"","context":"In &quot;Firebird&quot;","block_context":{"text":"Firebird","link":"https:\/\/engineswapdepot.com\/?cat=177"},"img":{"alt_text":"1980 Pontiac Trans Am with a ProCharged 6.7 L LSx V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/12\/1980-Pontiac-Trans-Am-with-a-ProCharged-6.7-L-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/12\/1980-Pontiac-Trans-Am-with-a-ProCharged-6.7-L-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/12\/1980-Pontiac-Trans-Am-with-a-ProCharged-6.7-L-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/12\/1980-Pontiac-Trans-Am-with-a-ProCharged-6.7-L-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/12\/1980-Pontiac-Trans-Am-with-a-ProCharged-6.7-L-LSx-V8-01.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/147356","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=147356"}],"version-history":[{"count":4,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/147356\/revisions"}],"predecessor-version":[{"id":147377,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/147356\/revisions\/147377"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/media\/147361"}],"wp:attachment":[{"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=147356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=147356"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=147356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}