I have a 82 buick regal and i want to put some 15 by 8s in the front and 15 by 10s inthe back does any one a good back space for these rims for my car. And does any one know how wide and how tall of tires can i put in the back like maby 275/70/15 basicly i want to get as wide as i can in the back with out the tires rubing on the frame or wheel and not sticking out past the quator panel also i have air shocks in the back.Thanks for any help.