[mikep]

"What do you do with all the wires running to the external
regulator after you switch to the 1-wire alternator ??"

Either you can hook it up to run the charging current from the alternator through the ammeter on your dash or you can simply ignore the wiring altogether.

Drawbacks to running it through the ammeter are that that circuit is not sized to handle the amperage modern alternators are capable of putting out so there is a definite fire hazard or melting the dash circuitry hazard if you load up the circuit . You could run a 40 amp breaker in line to protect the original wiring but that sort of defeats the purpose of a 135 one wire alternator doesnt it? A lot of guys do it just be warned there is a hazard. All you have to do is run the charging wire to the wire that normally runs to your harness from the old alternator and then jumper 1-2 and 3-4 on the voltage regulator connector. Remove the regulator of course or leave it there unhooked.

I just run a wire to the battery and my ammeter always shows a discharging conndition. I have a real ammeter I should hook up one of these days although I dont much see the point.