You got three treads going on this same subject...As I suggested before here is a good place to buy an
Eaton LSD for for your truck:
The follow is the part number and everything.
You will need a new crush sleeve ...You will have to order new carrier bearings which he has (b/c the eaton requires different bearings i think larger can't remember why for sure). i was able to reuse my pinion bearing. The new eaton setup perfectly with my original shims but make sure you keep the left and right shims on the correct side..... I got lucky, you may want to buy a shim kit just in case. Also i was able to reuse the cover gasket.

EATON LSD (GM 8.5" 8.6" 10 BOLT 30 SPLINE P/N 19559-1 Posi) from the following people:

Nathan J.Sadler
Purchasing Manager
Sadler Power Train Inc.
1250 1st Street NW
Cedar Rapids IA 52405
1.800.383.8238
www.sadlerpowertrain.com

He has them on ebay for $379
My shipping was only $15.00