I don't have an issue with doing a Stude box with the Dodge cab, heck, the "newer" Stude trucks used Dodge boxes, factory.

Mock the thing up and see what it looks like. If you like it, do it! Its your truck.

All that said, making a box from scratch isn't that hard. If you still have the Dakota box floor, your already 1/2 way home. All you need are sides, a front panel, a tailgate and fenders. The box on my 50 was completely scratch built or around $150, using new steel.
Gene