The KB237 piston should get you close to zero deck. I think those pistons are 0.020 down in a blueprint block. Zero deck is a suggestion not a strict rule. For aluminum heads I usually build engines with the pistons 0.005 down and then use a 0.036 MLS (Cometic) gasket.
So if I wanted to build it like yours I would need to square deck the block 0.015? I'm sorry just trying figure this out.
In a perfect world that is what would happen but you have to remember that these engine blocks are 40+ years old now. Best bet is to get the block to an engine shop so they can clean, inspect and measure it before you buy any parts.
Do you have a copy of the BB Mopar book that I wrote? If not you might want to start there. It is only $20 and it might save you some money in the long run.
