I am looking at a set of 03 Cobra rims and can get them in 18X9" 6.1" backspacing for the front and 18x10.5" 6.9" backspacing for the rear. I was thinking about running 265/40/18's on the front and 315/35/18's on the rear. Has anybody run this combo before? Will there be any clearance problems on a 97 GT 5spd? It has not been lowered yet, but will be after the rims installed. Is there a different tire size for the front that I can run? I want the widest tire without any rubbing problems.