[JayJay]

Thanks, all. To redmodelt's point, in a perfect world the inside dimension of the shell would be the same as the outside dimension across the flanges. In my case it looks like the radiator is OK, and the shell is oversize (I measured it, it's 21-1/2"). I suppose that somewhere in the last 90 years it could have been replaced with a non-OEM, although the Ford logo at the top sure looks its alleged age. I'm going to have to think on how to resolve this, the turned in flange at the bottom of the sides pretty much stabilizes the sides against being teased in 1/2" on each side. Longer mounting screws and spacers might work, but that might horse up the relationship to the hood clamps. Or cutting and rewelding the bottom flange (which doesn't show). Oh, the joys of restoration!

Thanks again.

JayJay