I was asking because I know someone that has a 70HD for sale. Obviously I'll need to do more research but I wasn't planning on doing this myself. I'm just trying to determine if it's worth buying.If you have to ask what the part names are for the pieces inside a differential, you have zero business attempting to put a new carrier in and setting up gears in one.
I'm not being an ass, I'm dead serious. This is where you pay someone to put it back together. It requires some tools you probably don't have and more skill than the novice mechanic has.