Re: 78' F150 to a 7.3 swap?
I'm thinkin you better get the 10.25/10.5 rear with the donor truck or you'll get REAL good at replacing parts in a Dana 60 rear. Same RG diameter and all..... just not the same.
As far as the swap, I would get the tranny and t-case with it. The aluminum F-series T-case is stronger/lighter than any of that old iron gear drive stuff.
If you get the vehicle chassis harness and the accelerator pedal it should be a snap to get it going. I've run my engine from a stand-alone harness before. Had it running within the day. About half a day actually.