Original Rear end type on my 70 Duster

Good question, It's a 4 wheel manual drum SBP, manual steering car.
Tag for those who want to see it.
View attachment 1715923762
Far out.
That car has a very late in the '70 model year scheduled build date of July 13, 1970 and a high sequential V.I.N. to go with it.
Most Dusters didn't have many options on them, yours is about typical, and it's a V8 car not the usual slant 6...
So that's a win!