what size wheel for 72 Dart?

michiganpat said
if that fits, then a 15x8 with 5" backspace should put the wheel in the same relative location.

Sure as far as backspace goes, with the 7's on mine, i can't get my fingers between the lip and the tire on the outside and may be 3/4" clearance against the spring on the inside. With a 8" wide on the rear of these cars, I can almost guarantee rubbing or tire cutting. Each to his own.