What A-833 is this?

Kendog 170 said
...'d like to find an Aluminium tail shaft housing for it as it has the iron one in it now now.....

Brewer's has (or appears to) aluminum 30 spline tail houses available. They also have a NOS DC extension I see for 1 arm, a leg, and first born (just kidding)...…..
Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists