A Body wheels on a B body rear axle assembly

What ‘73 A-body? Makes a BIG difference.

I have a ‘68-70 B-body 8 3/4 in my ‘74 Duster. I was able to run factory cop wheels, 15x7 with a 4.25” backspace with 225/60/15’s. That’s the widest that would fit, more backspace would be needed for wider tires. A Duster will fit a 275/60/15 with the right backspace, so 225 is a pretty significant reduction.

But on a Dart/Scamp you’d never even get a 225 to work on a factory wheel.