8 3/4 question

As far as I know MoPar never made an 8 &3/4 "posi". It should be a "SureGrip". Posi was a term near and dear to the GM crowd. Another way to identify an 8 & 3/4 rear is its shape - round, 1 piece, the carrier is bolted in from the front, it does not have a removable gear cover.