Recent update to our 80 saga:
A few weeks ago my son told me the truck was running rough to and from work. I drove it a bit to try to diagnose and then left for a week working in SoCal and then a week in FL for vacation. Just prior to the trips I threw on a cap and rotor.
I started driving the truck again this week and now I have about 3-4 cylinders that will miss at low rpms. I pulled the plugs yesterday to find the back three dirty and stinking of gas. I limped it home, and as I pulled in my driveway it tried to quit. I was able to two-pedal it to the garage where it died.
While looking at the plugs I noticed that i hadn't tightened the dizzy timing well and it had moved. After I calmed down a bit and started looking again I played with the timing, back and forth. It didn't seem to make a huge difference, but I was able to find what sounded like a more smooth idle. I could rev it better than before, but it still stumbles and misses badly at idle.
I'm going to try OEM plugs and wires as soon as they come in. If anyone has any suggestions based on my descriptions of symptoms, please chime in. Prior to all of this the truck was running quite well.