With these 15x8 rims with 4 inch of backspacing it looks like I might even have trouble fitting 225/60r15’s....If I cant even run those then I will sell these wheels and look at different options.
on my brothers 68 barracuda with BBP front end we did 15x6 with 4.5 back space using a 225 60 15 tire came out nice, with the rear tire being 255 60 15
