I purchased this truck 1983 dodge d50, knowing it was a pig in a poke. Old owner is diseased and I have no prior info. Wife said it broke down, then he was working on it and never got it running then it sat for 10 years. Today with fresh diesel, it cranks fires and idles for about a minute then craps out. I have bled the injectors, seems lift pump is supplying adaquate fuel to the injection pump. Removed timing cover verified timing is correct on the belt, have not checked lift timing on the injection pump. I need the manual to follow procedure. I have a feely something is gooed up in the injection pump. Any good service manuals online that show the disassembly of the injection pump, are rebuild kits available.. any help or suggestions about be appreciated, as well as links to technical data. Thanks 😊