XJ. I guess I should be able to fit the 33's. The 31's have a lot of room. I have a 3.5" lift kit under it.
You should be good. Depending on your rim it my rub on the inside front when you turn. Stocks rims will rub, but any aftermarket with a little bit of "dish" in it won't rub at all.
I had a 2000 TJ with the same lift and went from 31's to 33's. The above was my experience...
Look into those mud rover's. I had them, buckshots, and mud brutes on it. The Dunlops pulled the best, and I ended up getting them one more time before I sold it.