Im at 11-1. if I put the Apache on it would drop to 10. My thought is any hp increase in cfm would be lost with Comp. you would really need to deck the crap out of the apache head to get it down below 65cc.

if your starting fresh like Dustin did and plan for the 75cc chamber then your golden but my pistons were planned for Eagles. they are -13cc slight dish piston.

I had also contemplated getting the thitek porter head. But they have so much extra material I think to design your own port I thought it may take years for me to actually finish them.

so this is my plan of attack. also, when someone asks about the engine I can still say, its just 5.7 heads on a stroker shortblock