Couple of things in the last few days.

Last week, when trying to change the temp on the heater, the HEAT lever snapped. Ok, time to order new parts. They came in this week, so I got started on it. I found that the original cable was very tight and was binding. It did have a layer of rust on the outside of the coiled cable housing.

Installed the new lever and cable. I did put some black moly grease on the pivot rod for good measure.

While messing with the truck after fixing the heater, I heard a loud chattering sound in the engine bay. After doing some troubleshooting, I narrowed it down to the vacuum advance module on the distributer. I pulled that today and man, it was full of old, rancid fuel. No wonder it was acting up. I have no idea where the fuel came from, but it was old. The vacuum line does come from the base plate of the carb, but that shouldn't send fuel to the vacuum module.

Either way, I swapped out the module, reset the point gap, dwell and idle speed. Truck runs much better now.

Truck is a 1962 C10 with a '67 327 V8. Looked like a factory vacuum advance module, so it gave a good 50 years of service.

Dave

1963 C10 Longbed Fleetside (1977-1987)
1962 C10 Shortbed Stepside (2003 - present)
2006 2500 Dodge Quadcab 4x4 (2007 - present)