I've been wanting to build a new bottom end for my 03gt. Was planning on boosting the car a couple years ago, but as the years went on i don't really feel like going on with an all out build. Car already has full bolt ons and 44cc trickflow heads with crushman motorsport cams. I want to shed some weight so i wanted to go with an aluminum block. I know i can use 99-01 cobra, mach 1, aviator, and mark viii blocks. My question is with these 44cc heads what would the compression ratios be using any of those blocks. Car will be staying NA so i wont be pushing the stock internals to there limit. thanks for any help.