The resistor is located near the coil, if not on it. The location does not matter much as long as it can get a little air circulation. Using a mid 1960 Chevrolet resistor is a good choice. The original wire from the key is black. There is a bypass wire as indicated on the diagram, and my diagram as well. A 12v coil with "for use with an external resistor" written on it, or with a resistance of 1/5 to 2.5 ohms needs a resistor. A 6v coil is the same in every way as that 12v just described, and needs a resistor. A 12v coil designed to operate with no resistor is not to be used in this application, as it has no way of boosting starting primary voltage when cranking. It does not have a internal resistor. Jim
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