So is your d16a6 w/y8 head done? I am building this engine right now but non-turbo. I was figuring with stock shape pistons that my compression should be around 10.9:1. Either way, my question is, what kind of ARP head studs did you use? ones for a y8 or a6? Did you have to do any other odd mods and what head gasket did you use?