I want to add to something Sarastro and Nutmeg have mentioned, but slightly different. What EWD is mentioning as symptoms are quite similar to what was happening to me two weeks ago. After a new fuel pump, replaced coil, readjusted floats and carbs, I returned to the ignition and found the problem.
I had used a voltmeter and confirmed proper voltage from the ignition to the coil, but I wasn't thorough enough. I reconnected the voltmeter and wiggled the main power feed to the coil and suddenly the problem was clear. There was a break inside the wire insulation leading to the coil. While wiggling, I had 0 volts, 3 volts, 5 volts, 11.5 volts--basically all over the place.
My entire issue--cutting out while driving, and after warm-up, was that defective wire. My car now runs like new.
Not saying this will be EWD's problem, but I sure know I'll be more careful next time before jumping to conclusions.
And, BTW, isn’t the general rule, known to all old-timers, that the problem with your fuel/carbs is your electrical/ignition?