How large of tires could a guy go with 14x7 and 15x7 rims on the front and back? Currently the car has 15x7 rims and the front tires rub the frame and inner fender when you turn the steering wheel. Unfortunately I can't remember the specs on the front tires, but I think they are 225 - 60s.
Im not a tire expert at all, taking backspacing into consideration on the following---- but I think those 225's on the 15x7 will rub on the front, either d/s or p/s, probally wont rub tho if you go to a not as wide tire on that 15x7(maybe)....or a 225 on a 14" on the front. I guess thats why the nova came originally with 14". As for the backs, 15x7 can take a variety of sizes, but I think 245 is cutting it pretty close, you might have 3/8" clearance give or take from an unrolled lip area, theres a article in the nova resource pages about tire fitment.