Need some help! I purchased a 560 BBK witch came with new high comp piston, cylinder with new bbk sleeve and 105mm head gaskets. I also purchased a used head in good shape because my original was damaged and a new timing chain.. I installed bbk and set valves and timing chain to spec. Here's the problem, after installing cam holder and tightening the eight 8mm bolts in crisscross pattern to tork specs the motor is very hard to rotate manually. If I loosen some of the 8mm bolts then motor is easy to rotate.. Could it be the 105mm gasket that's causing this problem, I'm clueless to what's going on. FYI, I worked on the Fuji motor many times but never encounter this problem.