RE: best tire size for 94 mustang GT?
Those New F1's are insane.I think even if you did reduce the tire size and strapped on some F1 rubber your traction would probably get better. I had a set of Kuhmos that I blew off in a couple of months. You will be hard pressed to find a better tire for the money than the F1....I think.
If you want bray it up with the rest of the sheep...we recommend the F-body.