[gibby]

Not sure if I missed it, but if you continue to have a no start problem, my teenage son finally found and fixed an unusual issue on our '86 N/A. I mis-diagnosed the issue a few years ago as the alarm...did the jumper bypass thing and the car was OK for awhile until it wasn't. Recently we noticed that pulling the DME into the footwell, taking the loom cover off, and systematically touching/gripping wires could both assist in starting the car and (this is key) stalling it out once it was running. The wires make a sharp bend at the DME connector and we decided the cam position sensor and speed sensor wires must have been broken (or breaking) around this bend. Replacing these specific wires for about 18" and back to the connector at the DME seemed to do the trick and the car never fails to start now.
Looking back, I think pulling the DME out dozens of times during earlier troubleshooting "fixed" the open connection issue temporarily and was leading to many false diagnoses.
Might be something to check into if you have more issues.