I think so. Is the resistor external, or built into the coil? Normally, a GM "12 volt" coil is supposed to have an external resistor. "Internal resistance" 12 volt coils are for Fords. Voltage at the coil + terminal with the engine running needs to be around 9-10 volts. With the resistor bypassed during cranking you should see almost full battery voltage - - - -around 11.5-12 volts, usually. A good way to check primary voltage during cranking is to take the high voltage coil wire out of the center of the distributor cap and ground it, then crank the engine for a few seconds and monitor the voltage at the coil.

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