The "extra" resisitance coil is not a good idea. Use Externally resisted coils with a firewall mounted ballast resistor. Use Rockauto 1956 Truck as a guide.
5 months ago you found a problem was a bad condensor.
This is way too simple to be measuring everything. Tune it up. It's cheap. You are in a stage where you don't know if it's spark or gas or timing or....
Put the meter away. Get to a boiler plate with replaced parts.
Points plugs wires condensor cap rotor coil ballast...........$70 plus ship
If still runs rough. Check spark at plugs, then at secondary tower and look at points spark in the dark. If all good, check timing. All good?.......gas. Vacuum leak. choke, fuel pump, filter, tank vent. Anyway, report what you find so we can learn from you..
Others are better at meters and diagnosis measurements.......that is another way. I can do that, you can do that with their help. That's OK. Cost effective analysis, time and new parts dictate my choice in these situations. Even though it's called throwing parts at it. You're not buying a motor or transmission or differential. Electrical is harder to trace, in a "run rough", than gas. So eliminate electrical ASAP.
