I would hate to see any of these trucks go to the scrap heap, but I do understand that sometimes they are far too gone etc... It does seem like the PO really hacked into it without much rhyme or reason.
If the Body is in good shape, it may be worth keeping as a parts truck, and you can build something up better etc...
Truck: 1981 F-150 Explorer / Engine: 300-6 California MCU Feedback System / Trans: T-18 - 4 speed / 2.75 Ford Rear Axle Open Diff.