Will a 15" wheel fit on my 63 Dart

I have 15x7 cop car wheels on the front and rear of my 65 dart with 205/50-15 on front and 235/60-15 on the rear with offset spring hangers. No rubbing in the front, could go one size taller in the front with out any problem. I had 255/60-15 on the rear, but they rub some.