First introduced in 1971, the 455 H.O. was a logical progression of the 400 cubic-inch Ram Air IV. Like the top-dog 400, the 455 featured 4-bolt mains and a cast crank, rods and pistons. Similarly, a ...

There may not be any other Pontiac engine that harbors as much mystique as the Super-Duty 455. Introduced in '73 as a maximum-performance effort capable of sustained 6,000-rpm operation, it was ...