After boreing out my block from 81mm to 84mm is it still going to be reliable enough to run Hi boost when desired and not have to worry about the block crackin.. given that i have a decent setup.. resleeve, pistons..ect...??

 

if you bored out a b18a/b block to 2.0. hell yeah it's going to be weak. i would really sleeve it if you going to boost it. depending on how many pounds though, if your going for about 8-12 you might be safe with out a sleeve.

 

agreed