What manual transmissions were behind the magnums and do they fit into my car

I've got a 5.9 magnum in my Duster backed by an AX-15 5 speed from a v6 1998 Dakota. I bought the 5.9 flywheel off of rockauto and everything bolted together and works great. The sheet metal of the tunnel doesn't need modified but the upper loop of the torsion bar crossmember need modified