Mark WH, I think you're going to have to do a top to bottom test/check/r&r on the ignition system and the electrical system in general.
You should start a new thread with all of your issues to start a diagnosis with a clean slate.
Start with your plugs/gaps and then the wires. If they are of dubious condition or unknown age, buy new ones. Check the cap and rotor. Test the coil.
Make sure the points are perfectly adjusted and I strongly suggest getting one of Jon G's 200,000 hour condensers. Many strange driveability issues stem from the horrible ignition condensers available today from parts stores.
Is your truck still a 6v? If so, make sure your starter cable is 1,0, or 00 gauge cable and that all your connections are clean and tight. How about your generator and voltage regulator? If they are of unknown provenance, I would take both of them to an electric starter/generator shop for testing.
6v systems require a fully charged battery and perfectly functioning generator and voltage regulator to operate correctly. When all three are in sync, the starter will spin the engine as fast as a 12v system.
Last edited by Otto Skorzeny; 08/07/2022 10:38 PM.
