A-833 overdrive four speed
If it came out of a truck, is is probably a long shaft, which fits B and E body, but requires floor modifications for A body.
Sucks that the best option for an OD manual for Mopar are most prevalent in long shaft configurations that don't go into A bodies as well as the shorter version.
I have the same long shaft cast iron case for sale, been for sale forever, for 150 bucks.