I left my harness alone but added an extra fuse block powered from the hot alternator wire. I use this to power the components I have added. dual sucker fans, twin a/c blowers, I pod amp, and my headlamp raising motor. I will add this. I had a 64 Vette that would not start hot. I finally replace the wire going to the starter solinoid. The old wire had gotten stiff. Word has it that as wires age and current is drawn through that they build resistance and loose efficency, where you put power in and get less out.
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