...in simple terms how the Mopar points-style ignition system works? My particular vehicle is a 1969 Plymouth Road Runner with a 383. It does not start. It cranks enthusiastically. Plenty of fuel. The starter relay on the firewall is good. I don't seem to have any spark at the coil. Is this as easy as replacing the coil, or could it be the ballast resistor or something else? Please help!