If you leave the ignition switch on with the points closed you will end up burning up the points. It is normal for the resistor to get hot, It has to dissipate 3 or 4 volts so the coil runs on 8 volts. The resistor is encased in ceramic so it does not melt. In the diagram for the Avanti electrical system that is in the Avanti manual there is no mention of a green with black wire, only the black with green wire which is shown going from the Distributor to the tach sending unit. I am located about 50 miles South of Albany NY if i can be of further help. Ron