I am putting one of those kit together right now. They used a 1.865 ch piston, and a 6.700 rod. I had to take .040 off the block to get to 0 deck. If you are .040 in the hole and have 80+ cc heads your compression could be way off. What was the parts used in your kit? What was your assembled c.h.? Example 10 cc for the deck vol. 8 cc for the pockets 10 cc for the gasket and 84cc for the heads =112cc at tdc. 1035cc swept vol.
1147/112 = 10.24cr. ok still seems down on power. What is the intake close at .050. Could way down on dynamic compression.
Using advertised cam timing event your dynamic c.r. could be as low as 6.4 to 1 with excess lifter preload on a hydraulic would make it worse. mabe start with reducing preload to almost 0.
