At this point, Chevy’s 1970 LS6 Chevelle requires no introduction: with its rectangle-port heads and 2.19/1.88-inch valves, high-lift cam, forged crank and rods, 780-cfm Holley carb, and more ...

Produced from 1964 to 1977, the Chevrolet Chevelle spawned ... and the optional big-block V8 engines came with more than 350 horsepower on tap. But the LS6 took things to a whole new level.

When ordering a 1970 Chevy Chevelle, checking the option box for the LS6 also required other mandatory options. The Regular Production Order (RPO) Z15 SS454 pack included bright engine dress ...