[PoDuck]

If you are asking these questions, you probably don't want to undertake a rear end gear swap on your own anyway. It's a bit tricky getting things lined up properly, and should probably be done by someone that has some experience, unless you want to have a small explosion of rear end gears after a few hundred miles.

If it is truly a dana 44, I don't know why you would have trouble finding gears and parts. The local parts store should have them in stock, as they are very common.