15x8 Cragar SS's on the rear of a 66 Dart

Thanks, Higgs. If I go away from the 15 wheels I was looking at a 235-50R17 tire. It is a 9.6" section width, 8.4" tread width, and 26.3" diameter. It is .2" wider at the bulge than yours but maybe 4.5" of back spacing will work?
Bob