Re: Whats the best rearend???
Dont beat around the bush on this one, upgrade to the 14bff. It is cheap, strong, and you can get a Detroit locker for it for about $327. You can find 14bff for about $150, will likely need to spend that much on wheel bearings and brakes and that kind of stuff. Once you get it together though, you will have a super strong rearend that will give you trouble free service for years.
You will need to upgrade your front end to 8 lug which will cost you another couple of hundred dollars, and get new 8 lug rims.
It sounds like a lot of money, but is worth every cent. I go to school full time and work only part-time and was able to scrape together enough money to do it. Took me 2 months to do all the work because i had only about 1 day a week to work on it.
There is a club, PNWFS4X4's here in WA & OR. If you live somewhere in the Seattle area there are a lot of guys who can help you find the parts you need and do the work.
Also, don't be affraid if you have not done a lot of this kind of work before. I did all my stuff with the help of a friend and my Haynes book.