Perfect. When my harness was modified he kept the plug for the alternator on it. So all I have to do is connect the alt to the starter if I understood you correctly.The field wire is powered by the PCM from the factory. PCM connector C2 (red 99-02, green 03-07), pin 15. I retained that circuit when I modded my harness, and then connected the 12 volt post to the battery with an 8 gauge wire.