33x12.5"s will rub like mad on an XJ with a 2" lift (if they fit at all, you won't be able to "sneak" them in). If you use spacers, or wheels with less backspacing, so your tires stick out beyond the flares, you'll tear the flares up and rub like hell on the fenders with the slightest flex.
...and there is no such thing as an 2000 FSJ Cherokee
1990 XJ Laredo - White & Chrome
1988 MJ Pioneer - Metallic Green and Black