{"id":80791,"date":"2021-12-24T06:00:03","date_gmt":"2021-12-24T12:00:03","guid":{"rendered":"https:\/\/engineswapdepot.com\/?p=80791"},"modified":"2021-12-24T00:23:06","modified_gmt":"2021-12-24T06:23:06","slug":"1969-pontiac-gto-with-a-supercharged-ls3","status":"publish","type":"post","link":"https:\/\/engineswapdepot.com\/?p=80791","title":{"rendered":"1969 Pontiac GTO with a Supercharged LS3"},"content":{"rendered":"

\"1969<\/a><\/p>\n

Speedtech Performance<\/a> built this 1969 Pontiac GTO for Tony Madonia at their company in St. George, Utah. The car is powered by a supercharged 416 ci LS3 V8 built by Sullivan Performance<\/a>. It features Callies crankshaft and connecting rods, Wiseco pistons, Trick Flow heads and valves, Comp camshaft, Speedtech headers, 85 lb injectors, and Whipple supercharger. Brian Macy at The EFI Store<\/a> tuned the V8 on a Holley Dominator ECU into making 860 hp on 12 psi of boost. Behind the motor sits a Rossler 4L80E four-speed automatic transmission with a Yank Performance 2800 stall converter. A Mark Williams aluminum driveshaft sends power to a Ford 9-inch rear end with a Truetrac diff and 3.73 gears. The GTO rides on a Speedtech ExtReme chassis with power steering rack, Viking Crusader shocks, and Baer Pro+ 14-inch brakes front and rear. <\/p>\n

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Source: Speedtech<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Speedtech Performance built this 1969 Pontiac GTO for Tony Madonia at their company in St. George, Utah. The car is powered by a supercharged 416 ci LS3 V8 built by Sullivan Performance. It features Callies crankshaft and connecting rods, Wiseco pistons, Trick Flow heads and valves, Comp camshaft, Speedtech headers, 85 lb injectors, and Whipple… Read More »1969 Pontiac GTO with a Supercharged LS3<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":80802,"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":70,"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_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[167],"tags":[],"class_list":["post-80791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gto"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2021\/12\/1969-Pontiac-GTO-with-a-Supercharged-LS3-V8-01.jpg?fit=864%2C576&ssl=1","jetpack-related-posts":[{"id":107688,"url":"https:\/\/engineswapdepot.com\/?p=107688","url_meta":{"origin":80791,"position":0},"title":"1969 Pontiac GTO with a 755 hp Supercharged LT5 V8","author":"swaptastic","date":"November 16, 2023","format":false,"excerpt":"Detroit Speed built this 1969 Pontiac GTO for Kevin Hart at their company in Mooresville, North Carolina. Under the modified hood sits a supercharged 6.2 L LT5 V8 crate motor producing 755 hp and 715 lb-ft of torque. The motor features forged steel crank, forged steel rods, forged aluminum pistons,\u2026","rel":"","context":"In "GTO"","block_context":{"text":"GTO","link":"https:\/\/engineswapdepot.com\/?cat=167"},"img":{"alt_text":"1969 Pontiac GTO with a Supercharged LT5 V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1969-Pontiac-GTO-with-a-Supercharged-LT5-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\/2023\/11\/1969-Pontiac-GTO-with-a-Supercharged-LT5-V8-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1969-Pontiac-GTO-with-a-Supercharged-LT5-V8-01.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1969-Pontiac-GTO-with-a-Supercharged-LT5-V8-01.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/11\/1969-Pontiac-GTO-with-a-Supercharged-LT5-V8-01.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":94072,"url":"https:\/\/engineswapdepot.com\/?p=94072","url_meta":{"origin":80791,"position":1},"title":"1969 Pontiac GTO with a Supercharged LSA V8","author":"swaptastic","date":"December 27, 2022","format":false,"excerpt":"Metal Brothers Hot Rods built this 1969 Pontiac GTO at their company in Theodore, Alabama. In engine bay sits a supercharger 6.2 L LSA V8 with Ultimate longtube headers and a 3-inch exhaust. A Bowler T56 six-speed manual transmission sends power to a 12-bolt rear end with 3.55 gears. The\u2026","rel":"","context":"In "GTO"","block_context":{"text":"GTO","link":"https:\/\/engineswapdepot.com\/?cat=167"},"img":{"alt_text":"1969 Pontiac GTO with a Supercharged LSA V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2022\/12\/1969-Pontiac-GTO-with-a-Supercharged-LSA-V8-01.jpg?fit=1200%2C960&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2022\/12\/1969-Pontiac-GTO-with-a-Supercharged-LSA-V8-01.jpg?fit=1200%2C960&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2022\/12\/1969-Pontiac-GTO-with-a-Supercharged-LSA-V8-01.jpg?fit=1200%2C960&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2022\/12\/1969-Pontiac-GTO-with-a-Supercharged-LSA-V8-01.jpg?fit=1200%2C960&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2022\/12\/1969-Pontiac-GTO-with-a-Supercharged-LSA-V8-01.jpg?fit=1200%2C960&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":146852,"url":"https:\/\/engineswapdepot.com\/?p=146852","url_meta":{"origin":80791,"position":2},"title":"1973 Camaro with a 900 hp Supercharged V8","author":"swaptastic","date":"March 26, 2026","format":false,"excerpt":"This 1973 Chevrolet Camaro is powered by a supercharged 6.2 L LS3 V8 capable of 900 hp (671 kW). The motor is built with Callies Comp Star 4.00-in stroke crankshaft, Weisco forged 10.5:1 pistons, Callies Comp Star rods, custom 230\/250 PD blower camshaft, and custom exhaust headers. On top are\u2026","rel":"","context":"In "Camaro"","block_context":{"text":"Camaro","link":"https:\/\/engineswapdepot.com\/?cat=112"},"img":{"alt_text":"1973 Camaro with a supercharged LS3 V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/03\/1973-Camaro-with-a-supercharged-LS3-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\/2026\/03\/1973-Camaro-with-a-supercharged-LS3-V8-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/03\/1973-Camaro-with-a-supercharged-LS3-V8-01.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/03\/1973-Camaro-with-a-supercharged-LS3-V8-01.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2026\/03\/1973-Camaro-with-a-supercharged-LS3-V8-01.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":45153,"url":"https:\/\/engineswapdepot.com\/?p=45153","url_meta":{"origin":80791,"position":3},"title":"1971 Pontiac GTO with a Supercharged LSX V8","author":"swaptastic","date":"August 29, 2019","format":false,"excerpt":"Roadster Shop built this 1971 Pontiac GTO called \"The Judge\" for owner Fermin Adames. The car rides on their FAST TRACK fully independent chassis with Penske Racing coilovers, Baer brakes, and Greening Auto Company custom wheels (19x10\/20x10). Under the hood sits a supercharged LSX V8 built by Wegner Motorsports. The\u2026","rel":"","context":"In "GTO"","block_context":{"text":"GTO","link":"https:\/\/engineswapdepot.com\/?cat=167"},"img":{"alt_text":"1971 Pontiac GTO with a supercharged LSX V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2019\/08\/1971-Pontiac-GTO-with-a-supercharged-LSX-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\/2019\/08\/1971-Pontiac-GTO-with-a-supercharged-LSX-V8-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2019\/08\/1971-Pontiac-GTO-with-a-supercharged-LSX-V8-01.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2019\/08\/1971-Pontiac-GTO-with-a-supercharged-LSX-V8-01.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2019\/08\/1971-Pontiac-GTO-with-a-supercharged-LSX-V8-01.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":137928,"url":"https:\/\/engineswapdepot.com\/?p=137928","url_meta":{"origin":80791,"position":4},"title":"1967 Chevelle with a 1200 hp LS3 V8","author":"swaptastic","date":"September 12, 2025","format":false,"excerpt":"Roger Holder from Holder Motorsports has owned this 1967 Chevelle since he was a teenager. 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The body sits on an Art Morrison chassis which includes their Sport IFS control arms, modified C6 steering knuckles, power steering rack, and triangulated 4-bar rear suspension. Under the hood sits a Wegner Motorsports LS3 with their Stage\u2026","rel":"","context":"In "GTO"","block_context":{"text":"GTO","link":"https:\/\/engineswapdepot.com\/?cat=167"},"img":{"alt_text":"1968 Pontiac GTO with a LS3 V8","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/06\/1968-GTO-with-a-LS3-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\/2017\/06\/1968-GTO-with-a-LS3-V8-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/06\/1968-GTO-with-a-LS3-V8-01.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/06\/1968-GTO-with-a-LS3-V8-01.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/06\/1968-GTO-with-a-LS3-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\/80791","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=80791"}],"version-history":[{"count":12,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/80791\/revisions"}],"predecessor-version":[{"id":80814,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/80791\/revisions\/80814"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/media\/80802"}],"wp:attachment":[{"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=80791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=80791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=80791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}