compression on a 360

All the stock blocks I checked were .100+ in the hole. Speed pro makes some nice hyper pistons reasonable and you don't have to run extra large ring gaps. I'm useing the "405" ones 1.637 dh should be right at 9-1 with .053 head gasket and 62cc heads. The "116" ones are .05" taller for 9 to 10-1 with open chamber heads depending on gaskets and chamber cc and block deck. They have plenty of valve relief also. I got mine off the bag with rings for 137$ to the door.