The connection between the battery and the alternator was the one I was concerned with. Think about it, if the battery charge gets really low the high-power alternator will send all those amps down through the factory wire that is only sized for 1/2 the load. I added a heavy gauge wire from the battery+ to the alternator to take care of that.
The draw through the fuse box and stock circuits will not change so no problems there. Just be sure to make connections to high-power accessories that you add to the battery, alternator or other under-hood heavy direct feed (like the horn relay in early cars.) I'll leave it to others for advice on how to do this properly.
I agree that getting the power feed right is important to EFI and other electronic systems. At idle with the lights on, turning on the heater fan would literally stall my car. Not sure if the voltage drop was playing havoc with the Holley EFI that was on it then or the MSD distributor. Either way it was not good.
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1969 Lemans vert, matador red, 462 CI, 3.07 12-bolt posi
1974 455 TA, admiralty blue/red interior HPP "cover car" - sold
"The best way to show a car is to drive it"
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