15 x 7" Slotted Mag fitment problems

My 73 Dart uses 15 x 7 Magnum 500s that I believe are 4¼" BS with 205/60-15 tires. No rub.

The 72 Demon uses 15 x 7 Police steelies that are also supposed to be 4¼" BS but am using 235/60-15 tires. No problem out back. No rub out front under normal circumstances. Really hard bumps on sharp turns will cause the outboard tire to crash against the inside of the fender. Presently, the car has stock /6 springs. I think that will change with the 1.05" TBs going in this spring.

FWIW, I tried 255/60-15 on the police wheels on the Demon without success. Stockton Wheel told me the max that would fit was a 235/60-15. A 235/60-15 tire is 26.1" tall, a 215/65-15 is 26" tall. IMO, the tire is not the problem, a wheel with more backspace is needed. Hope this helps