How do I identify a ZZ4 crate engine?
How do I identify a ZZ4 crate engine? ZZ4 engines have L98 aluminum heads. If they are iron, it's a standard Vortec block. If it's a 96 or later truck block, it would have a roller cam in it. It's quite possible that this engine may have been built with a "crate engine" that was a short block, and the heads could have come from other sources. Where does the Chevy 350 crate engine come from? Made in the U.S.A. Our famous “Hum Baby” Chevy 350 crate engine! She’s a smooth running machine that is suitable for a practical enthusiast...