help with cam choice with kb190

Well awhile back I bought a com cam 20-232-4 it's a .480 lift and 280 duration and 110deg centreline the reason I chose it was it was one of the bigger cams I could get with getting away with single valve springs I was told my j heads would have to be machined to fit dual springs, so now I got my heads completely redone and I will check my valve clearances now I think I will have to run .060" heads gaskets just to bring my compression down to 10.1 I have also heard that bigger cams help bleed off high compression