Motor mounts broke.
Transmission.
3 new radiators.
Rusted rear wheel wells.
Power steering pump went bad.
Electrical components replaced.
Starter replaced.
Braking system.
Floor boards rusted through.
Door handles broken.
Dash broken.
Tailgate bad.
Original engine that runs great.
Actually quite reliable.
Steers like an 18 wheeler.
Loud with a simple exhaust upgrade, (glass packs)
One of the nicest looking older trucks I've seen, great lines.
You basically described my truck. I also have a 1975 D100, love that thing. I've got the glass packs on mine too, and all the same problems. Awesome.