I am amazed. The Wonderbus started. I almost fell over in surprise. Needed some timing adjustment, a little carb idle fiddling. But it sounded good. Smelled good, too -- like a good mixture.
Strong -- the new SVDA dizzie makes a nice improvement. Timing light showed it advancing as spec'ced in the instructions.
However and alas. After 15 minutes of driving, it died. I've had to run a bunch of errands so I have not been able to do any testing. While waiting for the AAA driver to show up and flatbed us back home I poked at the engine and looked for loose bits, wires or hoses and nothing obvious. I'll do more testing tomorrow.
But I do have one clue and this might provide someone with an idea of a good place to start: about a half mile before the engine died, the tach started getting spastic. Spiking up randomly. I listed to see if the engine was doing the same thing, but it was running smoothly. I was driving on level road at a constant speed. The crazy tach worsened, then plummeted to the "0" setting and the engine died along with it with the oil and gen lights on. As we pushed it to a safe place I noticed that the brake lights worked, so we do have power.
The tach gets its signal from the same terminal on the coil that connects to the dizzie.
One thing I noticed: when I took the coil off to work on the engine, I carefully labeled all the wires. Green dizzie and green to the aftermarket tach went to one side of the coil. Side labeled "+". There were two other wires, which went to the "-" side of the coil. Hmmm . . . wait a minute here -- Aircooled's notes said the dizzy (and tach) go to the "-" of the coil. Wiring diagram is not helpful, saying "1" and "15". This is how the coil was wired when I got the car. Might I be dealing with a blown up Bosch 12v coil?