Chevy Lied About The 430-HP Camaro ZL1 (And The Dyno Sheets Prove It)

In 1969, Chevrolet devised a way to put its Can-Am-derived aluminum 427 CID V8 into a car that shouldn’t have had an engine that big: the Camaro ZL1. At the time, GM’s corporate regulations restricted its subsidiaries from putting engines larger than 400 cubic inches into its compact and intermediate vehicles until 1970. Luckily, the conglomerate’s internal COPO 9560 option allowed the 427-toting Camaro ZL1 to exist.