There are two coils. One to use with a resistor and one to use without.
If you eliminate the resistor, you use the coil that matches that system.
When you buy the coil, the parts guy should ask you that question.
You want to use the coil made for no resistor, presuming you are eliminating it.
You should. It can be the source of phantom ignition problems.
If you are upgrading the entire ignition to a Ford solid state ignition, this is a good time to bring in an e-coil and get rid of the can.
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