Cars with HEI no longer used the wire from the starter to power the ignition during cranking. That was something needed only on points ignitions to bypass the resistor wire. The HEI gets full power directly from the ignition switch in both "start" and "run". If the new harness is wired exactly like the original, and the power isn't going to the HEI during "start", it appears that the ignition switch is defective. The wiring diagrams show the pink wire to the HEI should be powered during both "start" and "run".