Tore down Mikke's old block today. The pistons are in pretty good shape! The #4 piston is the worst, but still very usable with some minor scratches on the skirting. The piston heads have a coating, so I did a gentle cleanup on them with an old toothbrush and dish soap. Might need to do a bit more cleaning in the ring grooves though. I'll get a little more done there later. So, we have our 10.3-1 pistons! .010" off the head and that would get to 10.5-10.6 to 1. Not sure if that will be necessary, but if the head used needs a little cleanup on the mating surface......... Now to tear down the other block to see if everything else is going to be good for the upgrade. Pics of the pistons. 1, is a side shot. 2, is top angled, you can see where the coating starts on the heads. As for the rods that came out of Mike's old engine. Need to rcondition them and replace the rod bearings. When I loosened the nuts on 2,3,and 4 rods not much effort was needed, rod bolts were stretched. Mike, if you ran that engine much longer the rods would have ventilated the block!