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I am about to wire in a Rotunda-type column mounted tach on my 69 Standard 428 SCJ. I know this tach was made to be wired to the ignition, without running wires out to the coil. Rotunda instructions like those found on the WCCC site say to put the wire in line with the wire that goes to the Ballast side of the coil. My concern is that this means cutting the Pink ballast wire at the ignition switch. Wouldn't this effect the ability of this wire to absorb heat, which is what I thought it was supposed to do? I dont want to do this wrong, but I also dont want to run wires out to the engine compartment and coil. Any thoughts?