Do a search on previous posts. You will find all the info you need. A alternator with a internal voltage regulator has a different plug (wider with spades laying down - - ). External regulated alternator has parellel spades (=). Someone may have done a alternator conversion previously. I am no expert on this matter, I just used the info I gained on this site and this is what I learned. I hope this helps and I am giving you accurate info.