About the ZL-1 engines

[GMH454]

Yenko Camaro & Chevelles are COPO 427/425 hp cast iron block & heads. Same setup as first appeared in 1966 Vettes and full size Chevies.
ZL-1s are....ZL-1s. It is a totally different COPO and more part of the Harrell / Gibb mystique than Yenko.

Where you might have got confused is that Yenko continued to produce Aluminium blocks for the enthusiast. Came in various sizes, and were used by the Corvette & Camaro group 6 racers of the 70's.
Think Pickett used a Yenko block when he won the Trans Am in the late 70's in a Vette, but that's a [img]/ubbthreads/images/graemlins/scholar.gif[/img]storey for another day.