Pontiac joined the American big block V8 rivalry with its rare 421 Super Duty engine, showcasing its dominance on the track ...

Officially rated at 405 horsepower, the 421 V8 turned the Catalina into one of the most potent full-size cars available at the time.

The 326 was the inaugural base engine for the Pontiac Firebird's debut, supplying it with 250 horsepower, which was impressive at the time. The 421 would become renowned after being used by Joe ...