67 Barracuda Heavy Electric Load

So the needle went slightly towards the D when the car started then quickly moved back to the middle. I also measured 12.17 volts at the alternator post once the car started.
It should have moved slightly toward D (battery Discharge) while starting.
After starting it should have moved to C (battery charging) for a few minutes. Gradually returning to the center as the battery finishes charging.

Comparing with engine off, this last photo indicates slight discharging.
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When the engine is running, discharge indicates the battery is supplying power to run the car.
Caveat: True only if the battery is the only item attached to the battery side of the ammeter.

Removing the alternator again and will hopefully have it tested this afternoon.
You can test a few things before doing that.
1. Remove the field terminal connections and check whether either field terminal is grounded. Using an ohmmeter or continuity setting touch one probe to a terminal and the other to the alternator housing. Check both terminals. If either is grounded. Stop. Alternator is set up as a grounded field alternator.
2. Check that the field circuit is complete. Touch one probe to each terminal. They should connect, although there will be resistance from both the rotor windings and the carbon brushes. If they don't connect, stop.
3. If it passes both tests, then with the engine running at slow idle, connect the ignition feed to the field circuit (blue wire), and connect the other terminal to ground. The voltmeter connected to the alternator output stud should jump up to 14 volts. Do not rev the engine as there is no votlage regulation duing this test.
This completes the circuit for powering the rotor.


The headlights are just plain old stock lights.
Look at the lens and you can get a bit more information. But this is side track for now. Start a different threwad if you're interested.

Also, the car came with the electric fan installed when I bought it last summer. The previous owner put the clutch fan in the trunk. I can’t remember if the 67 barracuda had a shroud around the clutch fan - I have no shroud other than the one made to fit the electric fan. Would it be a simple as putting the clutch fan back on?
We can't see the radiator in the photos. '67 was unique but similar to '68-69.
The water pump looks like its cast iron and likely the correct for pre-70 cars.
If so, then then yes all that is needed is the clutch and the clutch fan.
Shrouds are most helpful when the car is not moving, although Chrysler did not always deem them neccessary on non-A/C equiped cars.
I recall the previous owner mentioning a HP gain when changed over to an electric fan……. Maybe 40 HP?
Sure at the top end of the quarter mile.
Well maybe not 40 hp. That's a bit of hyperbole.
The clutch fan is somewhere in between no fan and an electric fan in terms of hp savings at high rpm.
Plus, turning the alternator, especially when its working hard, also crauses noticible drag on the engine.