i think rubicon express (??) offers a kit to convert everything to 2 1/2 wide leafs, which improves the ride and flex. problem is it costs approx 1400 $$. you could also do a coil conversion, so really, it depends on how much you want to spend and what you want to do. i did a 2" shackle lift and 1 1/2 body, which is a nice and cheap way to do it. as for drive shafts, i live in calgary, and went to DSI (once again,

, it is right around the corner from modern), and have been very happy with their service. hope this helps.