Earlier in this thread I was trying to help and you half-heartedly asked if I was being an a$$. I decided I was going to butt out after that. However, I don't want to see someone wreck an engine on first start up.
Depending on cam timing, lift, and valve size, a Speedpro piston may not take much lift at all, and especially unlikely to handle over .600. You never know, tolerances stack, sometimes in our benefit, but left and right banks are slightly different with those pistons installed and they are absolutely not designed for that big cam market
Be prepared to check with clay and be prepared to swallow that you may have to cut the valve reliefs, great budget pistons, but they aren't designed for big valves and big cams