im not sure what your budget is but we can rebuild your cab and fab a new frame its alot of work but we can do it we just did a 1995 cab frame and all new parts every bolt nut screw all new it takes around 3000 hours to compleet a full resteration but this is the end result it has 6 inch lift...
ok first check the pin connectors in the fuel portion of your wire harness it may be a worn loose or dirty pin inside one of the plugs thats an easy fix and really cheep theres vids online on how to change the pins that number one now number two it could be the o2 sensor in the exhaust there...
most likly its going to be throwout arm rotted off inside the housing or could be the arm popped off the rocker ball inside the housing that was common problem if the truck was driven alot the ball will ware it can be replaced