Elec woes, crank, no start after running then parked.

I had a similar situation last year. Driving and car started bucking. I pulled over and the engine died. It turned over but wouldn't start. Fortunately, I carry all the necessary spare parts and basic tool kit. Checked; gas getting to carb . . . yes.
Spark . . . no.
BTW> if car starts but stops when key is released, the problem is ballast resistor.
Mine would turn over but wouldn't start at all.
Doing one thing at a time, I switched out the ECU. That wasn't it.
Replaced the coil . . . BINGO!
p.s. some coils require a ballast. My spare has one internal.
Later, I called product technical and asked whether I should disconnect my ballast.
Told, not necessary.