im sure it was asked before, but what is the widest rim I can fit into a dart wheel well with what off-set? the rear is a stock 8 3/4 and I want to run 15" wheels. thanks!
-kevin

I had a '73 Dart Swinger years ago, and I ran 15x7 cop wheels with 235/70s on the rear to kill some gear ratio. Pretty tight fit. I can't imagine a bigger combination fitting, but I could be wrong.

cop wheels fit easily with a 255
you can get a 8" rim in there with approx 5 1/2" of backspacing but you should measure to be sure.
just get a plumb bob and some tape for the floor.

thanks for the response, anyone eles want to chime in??