Rear Axle for A-Body

Hello.
this is my first post in this forum.
I Got my 72 duster last winter and i have been driving it this summer.
Goes and drives wery well....



But the 7 1/4 rear axle is dying. Now i have been looking bigger rear axle for my car. I live in Finland so i have much less old axels where to choose from.

So my question is this. what rear have you been swapping to your cars?
I know that some have used fords 8.8 rear from explorers and mopar B-body cars rears (and some guys here have been using toyotas hilus/hiace rears, but these have too high gear ratios to me)

So can you tell me what other car models i have to bee looking for to find new rear? like ford explorer. Other ofroaders? jeeps?

And i you have done some weir axle swap on your car can you tell how it worked and woh much customizin you had to to