Group,
The solution was simple.  The vacuum line was off of the AC solenoid, and the large hose from the auxiliary air regulator was out of the rubber housing.  I guess the engine must have backfired and blown them out.  That's all I can figure.  The engine idles great now.

My next project is to replace the ignition switch which doesn't seem to make good contact at times, and causes a hot starting problem after stopping.  Ordered a new one today from Ken.  After that, I'm going to replace the rubber fuel hoses.  Hope I don't have a fire before I can do this.

Thanks for everyone's suggestions.  They are filed for future use.

The van may be up for sale in a couple of months.  I hate to part with it, but I'm stretched too far these days to keep it maintained properly.

George
84 Camper
Cataula, GA