Engine Probs?

67dart i was poking around with my volt meter and found some results. With key on Ground to the batt and + on the alternator main stud only 12 volts while the car was running. Same across the ignition field terminal. There was 12 volts across the full field on the alt. There was 10 volts coming from the field wire going to the other side of the voltage regulator which i thought was wierd. I thought that was supposed to be ground. I have 12 volts at the firwall fusable link into bulkhead. Can you tell anything from those #s?