Get a used rear end.
Install a new DTT c/w a superior install kit which contains all the necessary new bearings, seals and new crush sleeve etc.
This will make the used rear "like new" again.
With the DTT you will have a bullet proff rear and no more worries.
I replaced my crappy stock LSD with a DTT and I have both peace of mind and a great planted axel.
Here's a pic of my axel and DTT install.
Hope this helps?
AL.