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Guys I am going to try to convert over to the 3G alternator from my stock alternator thats in my 67 Cougar now. First off what 3G alternator is a direct bolt in to my stock brackets? I know I have to change out the pulleys and put the old pulley onto the new 3G alternator, but I have looked at some wiring diagrams of the 3G and I was wondering I see there is a 3 wire plug with marked letters and I see the terminal marked "I" should go to what and where is the best place to pick this wire up at. All the other wiring for alternator is easy to figure out with the diagram I have seen