Everything that you have repaired, rebuilt or replaced on that rig is all completely normal for a truck that old. Owning an old vehicle for a DD sometimes isn't the best thing to have.
If it's paid for... park it, and find another vehicle to use as a DD.
Don't get me wrong... cuz drivin' an old truck is the shizznit, and it's cool as all get out that you're as young as you are wanting to drive an old rig. My first vehicle was a 1969 Buick Riviera, then a 1963 C10. But that was back when those vehicles were barely 20-somethin' years old. What you have described, would have been like me driving around my grandpas 1949 Chevy 3100 for a DD back then. That was an old rustbucket with lots of problems back then.. but cool as hell. However... no way would I have made that my only source of transportation.
Gary