Yes, we're talking about a 235 inline Stovebolt six. The carb is stock as is the fuel pump, I think. It's mechanical - has the little glass beehive on top. There is a fuel filter - new as of yesterday between the tank and the pump. New hard lines from the pump to the carb. Also new hard vacuum lines - I'm using the vacuum for the windshield wipers. Guess I'd better move the filter to the other side of the pump.
I did pull out the needle and blow through it. Seems fine.
This truck was running like a top a few weeks ago, then would fail occasionally and now won't idle for even ten minutes. I'll try the next step here. By the way, I've checked the points - seem fine, there's power to the coil, power to the distributor.
Thanks for the info and the encouragement.