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Jim, if you wanna e mail me what you have, I will try n help you out. If you run the voltage too high and pass more coil current through that Wico coil, it overheats as you realize. When they used that 6 volt XB distributor on 12 volts, they added a block looking series ballast resistor in line with the switched ignition wire from the ign switch down to the power input terminal on the Wico. When you measure the non running voltage on the wico input terminal, it has to be with the points CLOSED or it will still read the full 12 volts you know, regardless if any ballast or its size. The simple circuit is from the load side of the ammeter,,,,,to the Ign switch BAT side input,,,,, ,out the IGN terminal which is HOT WHEN ON,,,,, ,to and through the voltage dropping Ballast,,,,, ,,to the Wico. The Wico has another lil internal resistor also ahead of the coil. Ideally, with the points closed, the ohms value of the external ballast would be equal to the Wico's total (Its coil + internal resistance) that way it acts as a 50/50 voltage divider, dropping 6 leaving 6 at the Wico. The resistor values you mentioned ought to get you in the ballpark, however, be sure to make non runnign measurements when the points are closed. Let me know, Good Luck n God Bless John T jmn50@msn.com
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