It's on a 110 LSA, so shouldn't bleed down much, but I wouldn't go lower than about 10.2 because I like to get as close to the recommendations as possible to get the best out of it. It's going to take some work to even get 10.1 if you are staying with those heads. I'd keep the cam, and get the heads to match. Is that cam mech or hyd? Mine is hyd with a profile very close to that one making the power in my sig.