I still want to keep it stock because I don't plan to run the cobras in the winter, if I sell the car, if I want to get different wheels etc. Plus I wouldn't feel comfortable doing it, even if it isn't too hard...

Butas far as my suspension goes, it's a low millage car so I'm sure it's not too worn, and I don't plan on lowering it. So what max tire size do you think I could go with minimal rubbing, but still filling out the fenderwell enough?