1963 Pontiac Catalina 421 HO Tri-Power: The Original GTO's Bigger, More Muscular Sibling
1963 Pontiac Catalina 421 HO Tri-Power: The Original GTO's Bigger…
3 months ago
autoevolution.com
421 SUPER DUTY ON THE DYNO @ Butler Performance!! This 421 SD is using the early "306" heads. These flow a little less than the 1962/ #127's and much less than the 1963/ #980 heads, but it still made great power. Almost 500 HP and well over 500 ft.lbs. of torque!! We actually have both a 1962 389 SD with #127 heads and 1963 421 SD with #980 heads in the shop now that we'll be finishing soon. We love working on these old, rare SD's and really love to hear them scream on the dyno! #ButlerPerforman
0:40
421 SUPER DUTY ON THE DYNO @ Butler Performance!! This 421 SD i…
4.1K viewsAug 25, 2015
FacebookButler Performance Pontiac
Pontiac performance crate engines
Pontiac performance crate engines
Dec 5, 2024
proformanceunlimited.com
Pontiac’s Potent 1962 Super Duty 421 in Retrospect
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Pontiac’s Potent 1962 Super Duty 421 in Retrospect
5 months ago
hotrod.com
1962 Grand Prix 421 Super Duty: A Look Back at Pontiac's Ultra-Rare Heavy Hitter
1962 Grand Prix 421 Super Duty: A Look Back at Pontiac's Ultra-Rare …
Nov 29, 2023
autoevolution.com
The Untold Story of Pontiac’s 421 Super Duty — Faster, Louder, and Banned! #MuscleCar #ClassicCars #V8Power #EngineWars #CarEnthusiast #Horsepower #AmericanTrucks #DieselLegends #DieselTrucks | Wandering.Wheels
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The Untold Story of Pontiac’s 421 Super Duty — Faster, Louder, and …
14.7K views5 months ago
FacebookWandering.Wheels
Dealer Ordered a 1962 Catalina Super Duty 421 To Beat a Fuelie, Couldn't Afford the Finals
Dealer Ordered a 1962 Catalina Super Duty 421 To Beat a Fuelie, …
Feb 17, 2025
autoevolution.com
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