max tire size

i ran 26x8.5-15 Mickey Thompson ET Drag's on my '74 Dart in the stock wheelwells. they were mounted on Ford truck 15x7 steel wheels. my current '71 Dart has 255-60-15's on A/R 15x8 Outlaws in the back. the fit is perfect and they dont rub at all, but then i dont turn corners very fast either. i'm still suprised that the 15x8's fit!