My 69 had a internal reg. alt. on it. All that is needed is two plugs, one that plugs on to the end that goes to the regulator and jumps it in the correct manner and one that plugs into the old alt. plug that adapts to the new int. reg alt. plug. No cutting wires and is still correct if you want to change back. I don't know where to get the plugs, someone here might. Pete