Took 'em down to an engine shop for proper measurement. The guy measures at the wide spot of the skirt (perpendicular to the pin). He used mics and then feelers for the final test.
I've got the bare minimum of clearance -- 0.03mm on each side of the skirt.
My end gaps of the rings are at their outside limit, so I'll replace those.
Now...on to the heads!!!
1974 R90/6 w/1050 kit
'91 Bill Holland Steel w/Dura Ace