I would like to replace the ignition coil in my base 67. I know that the 67 does not have a ballast resistor and uses the pink wire. The car had the pertronix igniter 2 points in it when I bought it. Does that system require removing the pink wire? I am trying to understand if I need a coil with or without an internal resistor. Also what do you suggest for a quality reliable coil? I have the rocketman tach in the dash with a filter and have had both go bad and were replaced under warranty. I am concerned that when the coil heats up it send a distorted signal that is breaking them. On longer drives on warm days the tach would become erratic. I installed a filter based on a recommendation from the tach company and it worked fine for a few rides and then went bad. Hence I would like to replace the coil and see if that makes a difference.
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Is the current coil a yellow top Ford original type or an aftermarket?
What ohm is it, if it is anything other than a yellow top?
Have you tried using Pertronix troubleshooting? Pertronix Ignitor 2 Installation is downloadable from their website. Includes some FAQ’s and includes how to test coils for ohms value. You should also check voltage at coil as well. Knowing how the Ignitor 2 is wired is a good first step. Don’t buy parts until you sort out the original installation.