Steel wheels

We are at the point on our project (1969 Dart 340 Swinger) that we are looking for wheels. We want steel wheels with dog dish caps. 5x4 small bolt pattern. Nothing fancy. Problem is finding the right ones. We will be painting them red,
So I really don’t want to spend money on new.

I have a lead on a set of 14” from a 71 Demon with a slant 6. What I don’t know is if they have the right inner ring for the 8-3/4” dog dish caps we want to use. Does anyone know if they do? And how is that measured on the rim?
What number is stamped on the wheel? Interesting that the part number book I have only lists 4.5" unless it's a Rallye wheel.