Stock, the S30's don't work well with a backspacing over 4". Without coilovers, they start rubbing on the inside. And when too wide they rub on the fenders. For example, my 16x8's with a 225 wide tire are about the biggest you can fit under stock fender arches. I rolled mine and I still get a little rubbing.
I think that a 9" rear would be almost impossible to fit in the fender unless you had a seriously streched tire. The fronts usually don't rub on the fender, but if the backspacing is too high, they will rub on the strut. But with an 8" rim that's not a problem.
Brian, I see you got good autoX dunlops on there already, congrats. Are those rims 17" or 16"? And what size tires?
And what has been done for suspension upgrades. From the pics still on CL, it looks to still be at the stock ride height.
And brakes. It looks like those have been upgraded too.