couple months back i bought a set of 18x9 and 18x10 saleen wheels for my 98 gt....and i'm debating what size tires i should run with these. My car has h&r supersports w/ isolators, some cheap shocks and struts(i believe they were 2002 gt takeoffs), so im pretty low and the ride is kinda bumpy...u tire experts think i can run 285/35/18s in the back without having to roll my fenders, and should i run 245s or 255s up front????? i really wanna put em on already so i can take some pics....and help would be appreciated