Front axle, only the Rotors
Rear axle, only if planning on full width
Steering box, only the worm
Engine, trans; depends on what is in it. Engine is maybe, transmission not likely, transfer case not (too wide)
Odds and ends, plenty. When I gutted an F150 of similer vintage I had a good stock of used parts (voltage regulator, starter solenoid, window crank handles, etc.). One of the better keeps was the U-joint U-bolts. That saved me at midnight on a Saturday night having those in the parts bin.
But most of the big stuff changed too much to be useful