255's in the front

well i've got 245's on the front, on cobra r's with no problems.... but i think pre-91's had more clearance issues due to a slightly different fender style??? not too sure about that though...

I have 255/40/17 on some 93 cobra wheels from latemodelresto. and have no rubbing issues. Also I am having my prokit put on by a guy on here wensday so I will let you know how it does after the install

I have 255s on 18x9 98 Cobra R replicas on the front of my 85 with Eibach Pro-Kit springs, Bilstein shocks and 93 spindles/brakes. At first I had a minor rubbing issue at the far throw of left hand turns (against strut tower of passenger side). I added a single small shim to each side of my steering rack rods (limit-stopper bushings), and now have absolutely no clearance issues. Just another data point. That said, if you're OK with limiting the extremes of your steering slightly, you shouldn't have any issues at all (with the addition of the aforementioned bushings), through a wide range of tire width options.