Use the dial indicator to make sure it is exact TDC. #7 in work here. Did this to all 4 corners. At least 3 times each.
Use the depth micrometer to measure exactly how far the piston is in the hole. Easy to square the piston in the bore since no rings are installed.
Odd side measured .0265" and the even side measured .024"
Will deck both sides so the pistons are .005" in the hole. Custom thickness gaskets will give a "quench clearance" of .040". Future servicing of the block and it is squared to deck height of .000". a standard .040" gasket will maintain the proper quench clearance.