Thanks gentlemen. This 40 minute thing tonight is about what the last 3-4 trips were in duration. By the time I warm the beast up, get out of the garage and take the usual little trip its about 40 minutes. Maybe I'm watching too many detective shows but the time frame is a clue. The plugs did not have the carbon free spots on them when this current scenario began. I'mgoing to try the coil trick tomorrow when I does its thing. If thats not it pull the switch, clip a multimeter on it and play with it, but the time element is a sure clue.
Hey maybe Santa will let me a Model A specific diagnostic tool or two but I doubt it.
One bright spot the horn works great everytime.