Back when Racecar Man helped me get the engine running again, we got the timing set pretty easily. And the truck was running fine, especially for a vehicle that had not run a dozen years. Afterwards, Racecar Man remembered that we should have disconnected the vacuum advance before setting the timing. Since the truck was running OK, we left it alone.
But then Wednesday the truck was hard to start and it was not idling smoothly, so I decided to tackle the timing today. And after just a few minutes and a minor adjustment, the truck runs completely different. As it turns out, we were about 15 degrees too far advanced.
So this afternoon I have cruised the streets in my easier idling, quieter and more powerful truck. I am amazed at what a small adjustment in timing did for this engine. Racecar Man even got to take a drive. He may not have been the first passenger, but he will now go down in history as only the second driver since the truck came back into service.