looks like i am going to have to resleeve the zc block to run anywhere around 16psi. i am going to use JE pistons or maybe Ross racing pistons. well if i resleeve i am going to use GM sleeves. that means i can get rid of this weak 75mm bore. how big can you bore the sleeves and where do i get pistons that big for the zc?

 

i'm pretty sure you don't want to go more than30-40over. But i'm not positive.

 

why resleave. my friends zc is running 24 psi on stock sleaves with no problems for over a year and a half. just put in a blockguard