{"id":90462,"date":"2022-09-07T06:00:51","date_gmt":"2022-09-07T11:00:51","guid":{"rendered":"https:\/\/engineswapdepot.com\/?p=90462"},"modified":"2022-09-07T01:15:14","modified_gmt":"2022-09-07T06:15:14","slug":"1971-plymouth-gtx-r-with-a-viper-v10","status":"publish","type":"post","link":"https:\/\/engineswapdepot.com\/?p=90462","title":{"rendered":"1971 Plymouth GTX-R with a Viper V10"},"content":{"rendered":"

\"1971<\/a><\/p>\n

Horsepower Northwest<\/a> built this custom 1971 Plymouth “GTX-R” at their company in Bremerton, Washington. The project started as a 1971 Plymouth Road Runner with a 383 ci V8. It is now powered by a 8.4 L Viper V10 built by Prefix<\/a>. It features a custom radiator, Hellcat cold air headlight intakes, and custom side-exit exhaust. The V10 produces 630 hp and 660 lb-ft of torque. A Magnum T56 six-speed manual transmission sends power through a 4-inch aluminum driveshaft to a 8.75-inch rear end with a Truetrac LSD and 3.70 gears. Horsepower Northwest reinforced the chassis and added a Reilly MotorSports suspension<\/a>. A set of Boze custom wheels (18×8, 19×11) cover Bear 14-inch brakes with six-piston calipers in front and four-piston in back. The body is covered in PPG DBC F8 Green paint and House of Kolor clear. The car will be auctioned at Barrett Jackson<\/a> on October 20-22 at NRG Center in Houston, Texas. <\/p>\n

\"1971<\/a><\/p>\n

\"1971<\/a><\/p>\n

\"1971<\/a><\/p>\n

\"1971<\/a><\/p>\n

\"1971<\/a><\/p>\n

\"1971<\/a><\/p>\n

\"1971<\/a><\/p>\n

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

Horsepower Northwest built this custom 1971 Plymouth “GTX-R” at their company in Bremerton, Washington. The project started as a 1971 Plymouth Road Runner with a 383 ci V8. It is now powered by a 8.4 L Viper V10 built by Prefix. It features a custom radiator, Hellcat cold air headlight intakes, and custom side-exit exhaust.… Read More »1971 Plymouth GTX-R with a Viper V10<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":90472,"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,"_wpcom_ai_launchpad_first_post":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1159,358],"tags":[],"class_list":["post-90462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gtx","category-road-runner"],"jetpack-related-posts":[{"id":118317,"url":"https:\/\/engineswapdepot.com\/?p=118317","url_meta":{"origin":90462,"position":0},"title":"1969 Plymouth GTX with a Viper V10","author":"swaptastic","date":"July 18, 2024","format":false,"excerpt":"Trans Am Specialties built this 1969 Plymouth GTX in 2010 with a supercharged 8.3 L Viper V10. The motor features a Paxton Novi supercharger, methanol injection system, upgraded fuel system, and custom exhaust with tubular headers. Behind the V10 is a six-speed manual transmission sending power to a Dana 60\u2026","rel":"","context":"In "GTX"","block_context":{"text":"GTX","link":"https:\/\/engineswapdepot.com\/?cat=1159"},"img":{"alt_text":"1969 Plymouth GTX with a Viper V10","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/07\/1969-Plymouth-GTX-with-a-Viper-V10-01.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/07\/1969-Plymouth-GTX-with-a-Viper-V10-01.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/07\/1969-Plymouth-GTX-with-a-Viper-V10-01.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/07\/1969-Plymouth-GTX-with-a-Viper-V10-01.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2024\/07\/1969-Plymouth-GTX-with-a-Viper-V10-01.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":103378,"url":"https:\/\/engineswapdepot.com\/?p=103378","url_meta":{"origin":90462,"position":1},"title":"1972 Plymouth Road Runner with a Viper V10","author":"swaptastic","date":"August 1, 2023","format":false,"excerpt":"This 1972 Plymouth Road Runner is powered by a 8.0 L Viper V10 built by Caulk Racing. The motor is paired with a Tremec T56 six-speed manual transmission and Ford 9-inch rear end with 4.11 gears. Underneath is an AlterKtion tubular k-member with a power steering rack and Art Morrison\u2026","rel":"","context":"In "Road Runner"","block_context":{"text":"Road Runner","link":"https:\/\/engineswapdepot.com\/?cat=358"},"img":{"alt_text":"1972 Plymouth Road Runner with a Viper V10","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/07\/1972-Plymouth-Road-Runner-with-a-Viper-V10-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/07\/1972-Plymouth-Road-Runner-with-a-Viper-V10-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/07\/1972-Plymouth-Road-Runner-with-a-Viper-V10-01.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/07\/1972-Plymouth-Road-Runner-with-a-Viper-V10-01.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/07\/1972-Plymouth-Road-Runner-with-a-Viper-V10-01.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":15433,"url":"https:\/\/engineswapdepot.com\/?p=15433","url_meta":{"origin":90462,"position":2},"title":"1971 Barracuda with a Viper V10","author":"swaptastic","date":"April 10, 2017","format":false,"excerpt":"This 1971 Plymouth Barracuda called \"Medusa\" was built by All Speed Customs in Muskegon, Michigan. The car rides on a Roadster Shop FastTrack chassis with C6 Corvette front suspension and a four-link rear suspension with Penske double-adjustable coilovers. Power comes from a built fourth generation Viper V10 producing 750 horsepower.\u2026","rel":"","context":"In "Barracuda"","block_context":{"text":"Barracuda","link":"https:\/\/engineswapdepot.com\/?cat=106"},"img":{"alt_text":"1971 Barracuda with a Viper V10","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/04\/1971-Plymouth-Barracuda-with-a-Viper-V10-01.jpg?fit=1200%2C649&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/04\/1971-Plymouth-Barracuda-with-a-Viper-V10-01.jpg?fit=1200%2C649&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/04\/1971-Plymouth-Barracuda-with-a-Viper-V10-01.jpg?fit=1200%2C649&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/04\/1971-Plymouth-Barracuda-with-a-Viper-V10-01.jpg?fit=1200%2C649&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2017\/04\/1971-Plymouth-Barracuda-with-a-Viper-V10-01.jpg?fit=1200%2C649&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":135352,"url":"https:\/\/engineswapdepot.com\/?p=135352","url_meta":{"origin":90462,"position":3},"title":"1999 Viper with a 1971 Cuda Body","author":"swaptastic","date":"July 31, 2025","format":false,"excerpt":"We discovered this custom 1971 Plymouth Barracuda on Mecum auctions. It was built by Time Machines in Florida as part of their Six Shooter series. Under the 1971 Cuda body is a 1999 Dodge Viper chassis and underpinnings. The car's 450 hp (330 kW) is generated by a 8.0 L\u2026","rel":"","context":"In "Viper"","block_context":{"text":"Viper","link":"https:\/\/engineswapdepot.com\/?cat=210"},"img":{"alt_text":"1999 Viper with a 1971 Barracuda body","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/07\/1999-Viper-with-a-1971-Barracuda-body-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/07\/1999-Viper-with-a-1971-Barracuda-body-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/07\/1999-Viper-with-a-1971-Barracuda-body-01.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/07\/1999-Viper-with-a-1971-Barracuda-body-01.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2025\/07\/1999-Viper-with-a-1971-Barracuda-body-01.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":96283,"url":"https:\/\/engineswapdepot.com\/?p=96283","url_meta":{"origin":90462,"position":4},"title":"1995 Viper with a 1971 Cuda Body","author":"swaptastic","date":"March 31, 2023","format":false,"excerpt":"This custom 1971 Plymouth Cuda was the third built by Time Machines in Florida in the Six Shooter series. The company started with a 1995 Dodge Viper and removed the body. Then they installed a 1971 Cuda convertible body over the chassis. The unique creation is powered by supercharged 8.0\u2026","rel":"","context":"In "Barracuda"","block_context":{"text":"Barracuda","link":"https:\/\/engineswapdepot.com\/?cat=106"},"img":{"alt_text":"1995 Viper with a 1971 Plymouth Cuda body","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/03\/1995-Viper-with-a-1971-Cuda-Body-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\/03\/1995-Viper-with-a-1971-Cuda-Body-01.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/03\/1995-Viper-with-a-1971-Cuda-Body-01.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/03\/1995-Viper-with-a-1971-Cuda-Body-01.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/03\/1995-Viper-with-a-1971-Cuda-Body-01.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":103680,"url":"https:\/\/engineswapdepot.com\/?p=103680","url_meta":{"origin":90462,"position":5},"title":"Twin-Turbo 8.4 L V10 Makes 2272 hp on Dyno","author":"swaptastic","date":"August 9, 2023","format":false,"excerpt":"This 2014 Dodge Viper has a twin-turbo 8.4 L V10 built by NthMoto. In the video below, the engine made 2272 horsepower to the hubs on 31 psi of boost and One Ethanol \"R\" 117 octane E85 fuel. With more boost the engine topped out at 2570 hp. The motor\u2026","rel":"","context":"In "Viper"","block_context":{"text":"Viper","link":"https:\/\/engineswapdepot.com\/?cat=210"},"img":{"alt_text":"Twin-Turbo 8.4 L V10 on dyno","src":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/08\/Twin-Turbo-8.4-L-V10-on-dyno-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\/08\/Twin-Turbo-8.4-L-V10-on-dyno-01.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/08\/Twin-Turbo-8.4-L-V10-on-dyno-01.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/08\/Twin-Turbo-8.4-L-V10-on-dyno-01.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2023\/08\/Twin-Turbo-8.4-L-V10-on-dyno-01.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/engineswapdepot.com\/wp-content\/uploads\/2022\/09\/1971-Plymouth-GTX-R-with-a-Viper-V10-01.jpg?fit=1500%2C1200&ssl=1","_links":{"self":[{"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/90462","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=90462"}],"version-history":[{"count":11,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/90462\/revisions"}],"predecessor-version":[{"id":90481,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/posts\/90462\/revisions\/90481"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=\/wp\/v2\/media\/90472"}],"wp:attachment":[{"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=90462"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=90462"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineswapdepot.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=90462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}