Introduced in 1970, the Chevy 454 -- affectionately known as the Rat Motor -- was the largest displacement Chevrolet engine to enter the big-block engine showdown of the muscle car era.

The Chevrolet 454 Big Block V8 was created during the muscle car era and was one of the largest engines of its time, with a displacement of 7.4 liters. The engine could produce 450 horsepower ...