Looking for advice here? Helping a friend who has a 1970 open 8.2 with 2.93 gears. He’s looking to swap to a possi using used parts as he can’t find a 8.5 in his area. http://www.v8buick.com/index.php?threads/8-2-posi-carrier-wanted.358522/#post-3076812
Gonna need one of the buick only 68-70 carriers for that, IIRC. I believe 64-67 were the more swappable "bop" units, but cant go in a 70. And chevy 8.2 carrier is a different animal with no buick compatibility.
There are no gear sets available from Fabcraft, but AFAIK, the Posi carrier is still available. https://fabcraftmetalworks.com/product/rear-axlerab5-0470/ TA also sells the carrier, Part # TA 1780-C
I can help you if you just want to make the 2.93 posi which is a pretty good all around ratio. Just PM me and will let you know what we have. 10 bolt 8.25 from 68 - 70 era. 28 spline axles 27 spline yoke 1.875 pinion inner diameter.
It is a little easier to make the 2:93 unit compared to the higher ratios,due to where the ring gear flange is located.