360 .... Looking for 9.5 - 9.8 Compression ratio

I have 360(Std bore) with KB hype .flat top pistons, and i looking to make 9.5-9.8 compression ratio with my J Heads # 3418915(millodon 2.02-1.60).

My question is:

How much chamber CC including my gasket do i need?.... to make 9.5-9.8 compression ratio????