narrowed rear

70 DUSTER 340 said
Narrowed 8 3/4 Axles done by Moser 5 x 4 1/2 . 31 spline. Leaf spring perch center-center 30 inches
Back of flange - flange 43 inches. Housing and Axles only 250.00 OBO

And this narrowed rear fits with the springs moved into the frame rails?
Mini or full tub?
Stock axles? Narrowed?

Thanks.