If the coil is a 12v coul it does not need a resistor.
One way to check, hook a voltmeter set to read 12 Volts DC to the batt in terminal on the coil. If it reads 12 V then close the points or ground the lead going to the points. If the voltage on the input side of the coil drops to about 6 colts then there is a resistor somewhere between the input of the coil and the 12V supply. If it does not drop from 12V to about 6 volts with the other side of the coil grounded and you do not have a 12 volt coil you need to get one. simplest way is to just find a 12V coil at napa and put it in there.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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