Rob..... ....3-terminal Delco switch, toggle switch, OEM Ford switch. Doesn't matter, you have battery going in on one of contacts and when turned on, you should have battery volts coming out on the other terminal eventually going to the coil. Jumper between the two, to eliminate the possiblity of internally gunked up switched contacts. Just takes a couple of minutes. Howsomever, I would concure with you, that most likely, you are describing typically toasted frontmount ignition coil overheating failure. Now you need to determine wheather you have the OEM 6 volt frontmount ignition coil, or the newly avaiable 12 volt frontmount coil. Both require some external resistors to work on 12 volts BUT the 6 volt coil resistor requirements are different than the 12 volt coil resistor. If you are unsure what resistor/coil scheme you have, please post, and we'll try to talk you thru it..... ....Dell
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