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I have the pertronix coil and it didn't come with a ballast resistor.
I should measure the coil but if the 3.0 ohm coil is actually 3.5 or greater then it would be close enough to 4 amps. I'm kinda literal so when I see 3.0 I assume 3.0.
A ballast resistor would go between the ignition switch and the + side of the coil
Steve
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