[302exploder]

changing to manual hubs is easy, just buy some warn or milemarker hubs for a dana 44. if your auto hubs have the three bolt caps, you need the conversion kit, if you have the five bolt caps, you're fine.
manual transfer case is a little more complicated. you'd need the manual transfer case, shift linkage, shifter, modifying the floor.
to answer your question: yes, hubs easy, transfer case is a little harder