I always thought a .590 or similar cam would be overcammed for a 10.5 to 1 motor, but looks like people still had great success. I would love to get closer to 11.5 to 1, but i think id have to mill the heads quite a bit, and nobody sells a lightweight piston with a small dome. I may have to try one of these big solids, especially since I already have some isky ductile rockers. Fwiw I am also running a 950 holley and 1 7/8 headers for now.