Magnum 318 / 360 engine

Thanks for the feed back all!! All good info I can use in my search. Just finished a 96 Dakota (318 & 46RE) in to a 74 Duster. Package came with no electronics, so I went "old school" with a 727. I want to "step up" with my next project ( Magnum, TPI, computer, OBD2. A whole truck purchase ( 96 + ) out of a yard is on my hit list. Is the 2wd verses 4wd 46 series trans just a matter of a tail shaft change?