Wheel and tire size question

I say you should be fine. It might rub up front but as long as you don't max out the rack you should be alright (or you could get the steering rack turn limiter from ford). I have 17x9 on the back of my 89 and it fits like a glove. Im running 17x8's in the front and they seem to have plenty of room. If your car is lowered though you might want to roll the front fender lip so if you hit a bump you don't touch the wheel to it, besides that I'd say go with them and never look back.

I just put 17 9" with 255/40/17 on my 88gt and they fit fine except i had to take off the quad shocks on the back.