R.Wyant,
Can't sleep..must expound on stuff I know nothing about! If it is a 12 volt system there should be 12 volts at the + (key) side of the coil with the key turned on. I don't know if it RUNS at this voltage or not, but it could. Turn the key on, pop the cap, and with a screwdriver, open the points and you should be able to get the coil wire to ZAP to a ground. Don't go through the cap, just fire the coil to ground. If this works, you have a cap/rotor issue. The condensor quenches the arc as the points open, there should not be a huge flash from opening
the points with the key on. There, I'm done!

Stuart.