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 632 cubic-inch big-block, the most powerful engine Chevy has ever built, is available among the automaker's ZZ crate engine lineup as the ZZ632/1000 DELUXE. Carrying Chevrolet part number ...