8 3/4 a-body rear complete rebuilt on ebay

Here ya go: http://www.ebay.com/itm/20122152922...l?_from=R40&_sacat=0&_nkw=201221529225&_rdc=1

FYI: Posi-trac is a GM limited slip differential. Mopar's limited slip was called the Sure-Grip.

Good luck with your sale.