[dmjlambert]

Here is the conclusion about my random engine episodes of severe missing or hesitation which lasts about 5 to 10 seconds, engine almost dies, but then it comes back to life. I pulled the carburetor and sent it over to National Carburetor. I had purchased it with the lifetime warranty, so I thought I would take them up on that. They worked it over and sent it back to me. I put it back on the truck and made minor adjustments to the choke and fast idle speed. It has now been back on the truck for a couple weeks, it runs well, and I have been driving the truck every day. The problem first reported in this thread appears to be cured. I would like to thank everybody for your input, ideas, and encouragement.