I'm going to be getting some new rims and tires for a 1974 Duster with a stock suspension. The 245/60/14 tires I have on the back now look too small and barely fill in the wheelwell, so I am thinking of going to a 255/60/15 on the back and a 225/70/15 tire on the front. Is anyone running this combination on a stock Duster? Will I have any clearance issue in either front or back? For rims, I am planning to get 15x8 with a 4.5" backspace on the rear, and 15x7 with a 3.75 backspace on the front.