28x9 ET Drag would be ideal.
Don't think much wider than 9" will fit.
Could also use a 275/50/15 or a 275/60/15 drag radial.
I need this by next Sunday for a friend, used are fine. Just looking for something to make like 5 passes on. He doesn't really want to buy a pair since he's got something else in mind, but we would like to see what the car will do on more than 13psi.