The GM LS7 is the biggest-displacement small-block V-8 ever in a production car, and it only ever featured in the Corvette C6 Z06 and the fifth-gen Camaro Z/28.
In the history of Chevrolet V-8s, the 427-cubic-inch displacement has always belonged to the big-block — the kind of engine that defined factory muscle in the late 1960s and sat on an entirely different architecture from the compact small-block famil... [3662 chars]