The trans. looks like a standard SM465 4 speed to me. The transfer case is a NP 205. The splitter unit, I'll have to take your word on as I have no knowledge on that.
As for the axles, without photos it's hard to say for sure what you have. Might try looking in a catalog for differential parts...most have the cover gasket shape & size to distinguish one from another. Pretty much the corporate 14 & the Dana 60 could be had in any of the years: 3/4 ton & 1 ton for the rear, 1 ton for sure (maybe some 3/4 tons also) for the front. Lorne