small bolt pattern Cragar s/s

I'm not sure how the Darts' tubs compare to the Barracuda. I think on the inside they would be the same. Outside, I don't know. My figures for my car tell me that if I go with the Cragar SS 15 x 8, 4 1/4 backspace, I could easily fit a 255/60 15. I can probably squeeze in a 275/60 15. Not sure if I can get a tire this tall (28") to clear the front of the wheelwell. I've spent a lot of time this week drawing pictures to help me visualize how the placement of the tire will be affected by the different backspacings. I'm sure the 8" wheel will allow for a much larger tire to fit on the back than the 7" wheel.

I plan to go with a 7 x 15 in front. Not sure of tire size there yet either. I think my next step is going to be to mock up some tire sizes with cardboard on some bare rims I have & see how it all looks.