i'm going to have to say they're not going to fit without mods. i have 275's on 9" cobras, with stock suspension, and mine rub the fender lips under hard bumps and hard cornering. i also had to cut the dust shields off my KYB quads so they wouldn't rub.
I used to have 285 series BFG street tires on an 8.5" wheel. Fit without modifications, but would rub if you go too fast over a bumb or something.
Although the 275 series drag radials i put on next were wider than the 285's.