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I just took a look at the schematics in the FAQ section. The white (resistive) ignition wire that comes from the large square connector on the firewall T's into two yellow wires: one goes to the + terminal of the coil and one goes to the outer terminal of the starter motor. The white wire has high resistance and drops the voltage down to the appropriate level for the stock coil. That means your hei distributor is operating on lower voltage than it was designed to run on. Maybe this isn't a problem since you aren't using an HEI coil, but I don't know. Personally I think you'd be better off replacing your stock coil with an HEI coil. Then you could connect the distributor directly to a 12V source (Ignition Unfused terminal) using 10 gauge wire.
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