The rings all "look" good, I have not gone through them very carefully, I did put the #1 first seal in and measure the gap about 0.028" which is not "too" bad for a 4.040 bore.

I need to go through and blueprint the engine and go through everything.

I had KB 356 with a 4.040 dia (0.040 0ver 360, which I think is a lot).

The odd part about the pistons is the ridges/rings along the top, I would think you want this to be solid to transfer heat tot he block, but... Looks very fragile in a very high stressed area...