b body 8 3/4

It all depends on the backspace of your wheels. I have 14x8 mags with 4" backspace mounted to an a-body 8.75 and they barely don't fit, just maybe a 1/2" too wide. running 245/60/14's. Got it jacked up with air shocks, I rolled the wheel lips but not very well, a better roll will probably allow more clearance but really i just like the jacked up look haha.
-Tim