Thanks for the replies!
Here is some more info.
The first picture shows axle code D53 which I believe means 3.23:1 gear ratio and just left of that is a one in the box under D91 S/G that i assume is a Sure Grip code.
The second picture shows the other axle code. It is hard to read, but I think...
I've got a question about my broadcast sheet for my 70 Duster
On line 2 under axle it says D53 which I believe means 3.23:1 diff. Then on line 4 under axle it says 019. Is that maybe the code for the housing?
Thanks in advance!