Last I checked, Auburn only makes the posi carrier for the 3.36 and lower gears.
I checked this morning before I posted.
Auburn Gear #5420114 fits 2.93 to 3.23 gears,
#5420113 fits 3.36-up gears. ('up' meaning up to about a 4.30 gear)
Eaton has the carrier that only fits 3.36-up, and not the 2.93 to 3.23 gears.
There is some confusion out there whether these work on the later 68-70 8.2 rears. I believe they do work on the earlier 64-67 8.2. Best to check with Jim. He can set you up with used, rebuilt, or new parts.
Tony, let us know how you make out. I'm sure others here would like the info.