Not going to try to sway you towards a certain body style but I’m almost positive the wheel wells are bigger on the 1970-1972 dusters. Not positive after that. On my sons 1970 duster we rolled the lip gently with a baseball bat on the rear and he ran a 10 inch slick with stock wheel tubs. Wheel offset of coarse comes into play. Now he runs a 20 inch street radial and I don’t even think we would have had to roll the lip. Not sure you can do that with a Dart.