I'm runnning 245/60/15 BFG T/A's on 15x7" rims front, 275/60/15 BFG's on 15x8" back. My rims are Wheel Vintique rally wheels which are great in my opinion. If I change anything, I'll probably go to a b body rear which would allow me to run 10" wide rims on back, but I'm very happy with how it looks & rides with what I have. Mine is a currently a street car only, no 1/4 mile or track days so far. If I were to change that I'd probably be looking for better rubber pretty quick.
Later, Jim