The three pistons visible are all the same. It's just different light reflections making them look that way. I also think the engine should be torn down. Someone didn't know what they were doing when they put it together and unless you go through it now, while youve got it already partially broken down, you're going to have to do it real soon. I hate doing the same job twice. The cylinder walls do appear scratched and those pistons look really bad for such a new engine.

I used to have one of those engine stretchers, but it broke when I tried to stretch a flathead into a 392 hemi.

Art

I may be old, but. What?