However, GM mandated a maximum size of 330 cid for its mid-sized cars, so the bore was reduced further to create a true ...

These vehicles came with a variety of engine options, each with a different horsepower rating. From Pontiac's very own 326 V8, 389 V8, and 350 V8 to the 403 V8s, 265 V8, and Chevrolet's 250-cubic ...

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 ...