79 cutlass in need of posi looking for help and info

[jrm81bu]

alright i was worndering cuz iv heard that the gbody spline is 26 count and the fbody is a 28 count spline but im not sure and what about welding the planitary gears to make it a posi i kno a guy that did it to his truck and its lasted years but just dont seem the best way to go about doin it

The f-bodies went to the 28 spline axles in 88 or 89, before that they were 26.