That's really got me thinking now. When the machinist first did the '65 block he had the pistons to press them on the rods. Not sure if he measured them when to get the exact size boring but with the '68 block he said I didn't need me to bring the pistons for him to bore it. Originally he did say on the '65 he would be boring loose because I was using forged pistons but not really sure what that consists of.

I pulled it tonight, pulled the pan & didn't really see anything. The bottoms of the cylinder walls looked fine. I'll be pulling the heads & disassembling the rotating assembly tomorrow night.