Ring end gap

Yes on the 237's. I don't have a feeler that small but they do seem to "rock" a bit in the hole.
Got the rings from hughes and per their part number they are right, checked all bores with different rings they are all the same.

Okay I found a guage small enough. checked clearance at the skirt and it looks to be within spec .002-.0025, but the pin sides are much looser.