I not sure why I’m opening my mouth on this, but what the hell…
I want the best parts for my money, I do not want the dim headlights and need to support my eletrical components at low RPM like when the eletrical fan cuts in and draws 30amps, support eletrical fuel pump 7amps, support ignition 8-10amps, radio 10amps, you see my point.
30 amps + 7 amps + 10amps + 10 amps = 57 amps not including head lights, other lights and electrical loads not accounted for. Seems to me the stock alternator is doing a job it was not designed for.
You want brighter head lights, run 10 gage conductors to them and power directly from battery via relays triggered by existing head light circuit bypassing the bulkhead connector; improve grounding of lighting circuit with larger wire back to battery.
Install a more efficient fan that doesn’t draw a ridiculously high 30 amps.
Power sound system via relays directly off battery triggered by existing radio circuit utilizing 14 gage conductors bypassing bulkhead connector.
You don’t have an alternator problem, you have an engineering problem stuffed into a forty year old electrical system never designed to do what you are attempting.
