did you find some 15 inch SS rims ?
I have had trouble in the past with old rims having a slow air leak , so i took all my SS rims ( no tires on them ) to a tire shop to have the bead area cleaned at speed while on the balancing machine. Then checked with a dial indicator gauge (very slow turn) while still on the balancing machine , all had a slight hop ! tire shop said all rims from that time period were not round but said the rims i have were safe to use and i would not find a rim that did not have a slight hop . Then I took them all to a hot rod shop to rework the outer rim dents and reshape the metal, I then had them all sand blasted , unreal how much $ i now have into those rims !
so if you buy rims have a tire shop check them ( no tire on rim) and see if they also have a slight hop .
anyone with these rims please give us feed back on how your rims check out with the dial indicator gauge while on the tire machine , is this true ? they all hop !