that's a bit of a complicated question because a ton isn't much more than normal truck can carry. true one-ton fullsize truck can carry way more (7k#+).
on one hand, to haul a ton in the bed you technically don't have to do anything aside from the usual Metric ton features (stiffer springs, stiffer shocks, better rear axle, and steel rims). that's rated for carrying 2200 pounds right there (assuming everything is in excellent condition of course).
on the other hand, there's no legal way to carry that much if your truck was rated for the lesser amount. max weight from the factory is max weight for life. the law and your insurance company don't care if you've improved everything little thing.
on the other-other hand, we all like upgrades and better performance! so there's a ton (pun intended) of the usual you can do including: better gear ratio and the dual brake booster (tops of my list), plus later model (aka bigger) ujoints/shafts in the front axle, the WJ brake conversion with hi-steer arms, v8 ZJ steering bits for tougher stock steering, disk brake conversion on whatever axle you pick for the rear, WJ control arms, and a big fat trans cooler if you have an auto.
the internal upgrades to the t-case are super cool, but won't really help much when hauling 2200 pounds as you won't very likely be using 4wd at the same time. or if you are, it's for a super short time trying to get off of the wet gravel next to the pavement. The stock t-case is already rated for such a thing. but on the other-other-other hand, I've been planning on the same upgrades for my wheeler.