Cragar SS chrome wheels

In Looking at 61c ss Cragars 5x4 bolt pattern 15x7 with 4.125 back spacing to go in my 70 Dart 8 3/4 rearend. I currently have stock rallys with 235 60r14 and have 3/4 inch clearance to the wheelwell and 3/4 to the leaf Springs. Do you think 255 60 r 15 will fit?
I found of wheels a incl lugs and washers
For $1088 delivered, does that sound fair