How friggin hard is it to change a differential? Is it something that requires special tools or can a guy thats turned a few wrenches do it?
The diff change should not be that bad. I would recheck your backlash so you will need a indicator and some shim stock just in case. http://www.superstallions.com/tech/drive/gears/gears.html Check out this site its for a gear install but a lot of it will apply to you.