Swampers are hard to balance and wear like a silk shirt worn by a football player at the super bowl. They also howl like twelve drunken banshees. If your FJC is a toy then they should do ok if you put some 4.56 gears in the diffs. They are pushing the drive line a bit. You technically need to swap the rear axle and the front ones as well to handle the load the tires put on them just to be safe. See if you can find some large 33's as not all 33's are exactly 33 (or more) inches. Check the manufacturers sites, they usually have the exact measurements listed.
Actually the gears should be shorter for the 33's, but they work ok, you loose a bit of power. You really need the 3.91's to be truthful, they would be a bit better even for the stock 32's, but 4.10 is the way to go for gearing. I wish the 3.91's were part of a package I would gotten them.