Rear end tear down

I am thinking about rebuilding my rear end. There is play in the wheels and a lot of play from the drive shaft to the tires. I am curious how hard it is to rebuilt the rear end and what it might entail if i could do it at my house. I need the car running for Thursday. Any advice would be key rite now as I am in the process of picking out parts to buy. If it will be too much work i will consider buying a used rear end so if anyone knows what years will match up to my 86 that would be great too.

Thank you
Nick