Can't really help you on your other questions but as far as the rear end, that truck has a dana 80. Automatic 2500's have a Dana 70, all others have Dana 80s (for 2nd Gens anyway).
The tire problem can be fixed by an alignment.If it needs parts all you should need to do is replace the tie rod ends.As for the clutch,,just upgrade to a South Bend or such quality clutch.Whats the asking price?Oh and-It's 4x4
-front passenger side tire was worn bad on the outside
-so if the hydraulics let go, you need a slave cylinder? plus probably just upgrade to an aftermarket clutch at that point?