74 duster electrical problems

Hello Dart
Well I'm back from the great state of Colorado. Enjoyed the trip but am tired.
Back to the duster. I ran all the test you suggested, the last test was grounding the field to see if the voltage regulator showed charge. I did and the meter pegged positive. So I checked all wiring for grounds and found none. Everything checked out so I threw on another new regulator just so everything would be totally new and there would be no second guessing. Car started and ran, voltage meter showed a plus charge of about 10 amps the backed off to zero. I also have a voltage meter in addition to the amp meter. It showed no volts. I shut everything down and disconnected the volt meter just to be safe. I removed the meter and checked it directly to a spare battery. It just barley registered 2 volts so I guess it was damaged in the shorting of everything. Leaving it out of the system for now. The only thing I haven't hooked back up is the tach. I'll reattach the green wire to the coil some time this week.
As of right now every thing works properly it runs and charges.
I appreciate the help you gave me. The diagrams and suggestions really saved a lot of time and gave me some direction.

Thanks
Big Block