the HEI usually gets a 12ga wire from the firewall connector to the coil/batt connection on the cap..
the points harness will have the resistor wire..
you can use the resistor wire to trigger a relay with battery power to the HEI..
replace the resistor wire with a 12ga stranded copper wire..
tie into the ignition wire on the other side of the firewall with a 12ga wire to the distributor..
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