Nope! Leave the internals alone and find complete front and rear ends that will fit and put them both under there. You will have as much in having the gears bought and installed as you will removing and installing new used ones.. Start looking for a late model yj with the gear ratio you need.
I hope you got a good deal on that ride.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

professional bovine relocation specialist