Back to my primary problem - it won't start.
To recap - it had run fairly well but rich on the initial firing, with some dieseling on shutdown. On the final test we drove it a 1/2 mile and it quit cleanly on shut down. After not being able to start it I put a new coil and Ignitor on it, and noticed the timing light was showing flashes on the coil side, but none on the plug side of the distributor, and no spark on a plug when pulled.
I bought and put a new cap and rotor on, cleaned the spark plug terminals and put the wires back on. Yes, I got the firing order right. I charged the battery before any tests (12.9 V). Tried to crank it a few times by giving it a good squirt of gas from the carb and holding the throttle about 1/4 or 1/3 open. Not even a hint of firing.
Then we pulled the number 5 plug and with the plug making contact with intake (I checked it for continuity to ground and it was good), and the plug made a weak, orange flash, and missed some.
Then I ran a wire from the positive on the battery directly to the positive on the coil and tried it again. Same weak orange spark. Then we changed back to the original coil, same weak spark.
Then I thought I should check continuity to the plug, so we checked the inside of the cap to the end of the plug wire, and got about 120 ohms, so no problem there.
Then I checked the plug - I'm running Autolite 3924s on Barry's recommendation, and we saw 8,000 ohms, which seems in spec. They are a bit dirty (oily) but not soaked in fuel.
We are not getting any fire from the engine.