I put new flat top pistons in the 4 corners of my '64 327 block today, only had enough wrist pin keepers on hand to do 4 so I did the corners. This block has been tanked, bored 030 over and decked. It is very clean and is going together on an engine stand. The crank is a '67 with standard uncut journals. Rods are full floating Scat, also new. 1 piston measures .007 and the others are .016 and 2 at .017 down. The two at 007 and 016 are on the same journal and the 2 at 017 are on the same journal at the opposite end of the block. I used a dial indicator on each piston to arrive at their tdc and a straight edge with feeler gauge to get my readings. How much variance should I expect from one to the other? What's acceptable? School me on how I should be measuring this please if my method is unsound.