Anniversary 427 Big-Block New for 2008, GM Performance Parts re-releases the vaunted ZL1 crate engine. Built off of the original (and restored) tooling, it's as close to the real thing that you can ...

The ZL1 is pretty much an aluminum version of the 427 L88 big-block with open-chamber heads and was originally planned for the Corvette. The aluminum block used cast-iron sleeves (retained with a 1/16 ...

The ZL1 badge has always carried a quiet asterisk. On paper, Chevrolet’s wildest big blocks and supercharged V8s looked impressive enough, yet insiders knew the official numbers left a lot on the ...