According to the instructions for that unit, posted in this thread, they want the COIL to have 1.2 to 1.8 ohms of resistance. They ALSO want the coil fed with a resistance in the power-supply wire--the original resistance wire, or a 1.2 to 1.8 ohms ballast resistor.
Therefore, TOTAL intentional resistance in the ignition coil circuit would be 2.4 to 3.6 ohms. A resistor coil by itself won't be enough; neither will a typical ballast resistor by itself. This system needs both the ballast resistor AND coil resistance. Which--to be honest--doesn't make any sense because they claim that the ignition module is "Over-voltage/over-current protected."
Overall, NOT my first choice in an electronic ignition system. God bless Genuine GM HEI--protected (at least short-term) to ~18 volts.
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