Howdy , I Just picked up a 68 Panther with S7 wheels . I'm Looking to leave the slim S7 wheel / tire on the front and switch to a S2 on the back for the wider tire . Are the hubs the same size in width ? . Would it fit ? , but only vary in rim height ? . How wide a tire would you recommend working with a stock rear fender . Or with no fender . I'm going for the chopper look and any suggestions for a Kool set of wheels on the market would be appreciated .