faceplant

I recently purchased ford racings 5 lug conversion kit w/ cobra disc brakes, for my 92GT. Along w/ the kit im upgrading to 31 spline axles and new diff, along w/ gears. I know this is a lot of work but my problemis in selecting new wheels.. The kit calls for 17x8's all around. Im looking at a set of 17x9and17x10.5's. HOW CAN I MAKE THIS WORK? I love the look of a wider deep dish wheel for the rear, but im afraid the 10.5 wont fit. Iv tossed around the idea of rolling the fenders and even building a new shorter rear end off of a '97. Im not opposed to find a different wheel size too, maybe a 17x8with a 17x9 rear? Any ideas guys?