I assembled it for a mock up (no rings or piston clips installed yet) for checking bearing clearances and piston height. The rods are new. I know they still need to be checked. I am going to do some swapping and rechecking in the next hour. I measured the the piston to deck height myself inline with the pin and checking piston rock. Crank was not indexed. Stock forged. I am assuming based on the difference between the side to side more was taken off one side. I should be able to verify that by swapping some around. I understand production tolerances vary some. I can cut the tops myself at work. The valve relief dims are my bigger concern if I do this. You are correct about different pistons. What I have is time and a bit of knowledge, which is growing by the hour thanks to you guys. Money is the bigger issue if I have to spend I guess Ill have to. I already have the SM closed chambered heads. I was expecting such a large change in height. The reason I had it decked was for a good sealing surface for the new heads. It was a bit rough.