Thanks guys! The part I ordered from a local harley place is supposed to be a "Standard electric" supplied part. Hope that means made in USA (or Mexico)
The third source I checked was the owners manual (just like Howard posted) and agree on the 30 amp rating.

The parts book, and the wiring diagram dont list the amperage on that breaker, but I saw some threads here where it was 30 Amps.8ball HD shop
Looks like that is a part used by Harley Davidson, which makes it easy to get over here.
Does this look like the right breaker?

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I drove 60 miles roundtrip to Stuttgart for a friends birthday tonight, and stopped by the Porsche factory for some pictures.
Car ran well at 60-70mph indicated. On the way home, the headlights started to blink and went out. I guess the circuit breaker or the switch are 70 years old, so I will consider adding relays to the headlight circuit. No lights on the Autobahn at midnight Was not cool. Glad I could at least use my 4 way flashers!
After a few seconds I turned on the parking lights, and the a min later the headlights, and had light again....

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Thanks Howard,
I drove the car ~20 min to work this morning. Part of the way with the headlights on and voltage was at a nice ~7.3 the whole time. The dummy light also stays off as I am getting 6.5 volts at idle. That was nice, but I am not ready to close the books on my charging system adventure.
I'll try the grounding of the field terminal and see what kind of voltage it goes up to. -if it goes up to 10 like you suggest, or if it stays in the 7-ish range.

I think I can hear my new brushes making a little "wissssh" noise...I just threw in the brushes, and didn't clean up the commutator or seat the brushes....I see I will be getting a phd in gen rebuilding and regulator service in my future

I cleaned up the Gen a little bit, and put some insulation on the wire for one brush on the "high side. I polarized the gen by briefly connecting the A and B Terminals.
After starting the car, gen output was still rather low and the lamp would stay on quite a while when revving up the engine.
I grounded the field wire for a test, and voltage went up to about 6.5, and was back to the normal voltage with some flickering of the Gen light at idle, and voltage up to 7-ish at higher Rpms after that. After removing the ground from the field terminal voltage Was still ok.
I will read the manual about cleaning contacts and setting the voltage on this old-school regulator.

My idle is set to about 550 rpm, which used to be enough to keep the BAT light off at idle. Something changed since I last drove the car a week or so ago, that's why I removed the generator to replace the brushes. I hope fixing the one missing bolt, repairing the loose brush wire connection, 2 new brushes and a clean up will do the trick.

I agree that the Gen is pretty dirty and greasy, so I will take the time and clean it up with brake cleaner etc. Other than being dirty and the brushes worn down, the bearings look and feel OK.

That is a good idea to put some shrink wrap on the wire to the one brush. I will do that. The diagram helps too.
Thanks guys. Hope to get through the generator in the next few days.

I was taking my daughter to Kindergarten this morning in the caribbean, and noticed that my battery lamp Was on at idle and would slowly go out when I gave the engine some rpms. Voltage Was also around 6, and not 7.4 or so....I removed the Generator this evening and found that one bolt to the lower mount Was missing, and when I removed the old brushes, one of the wires fell out of the brush itself!
I replaced the brushes as shown in the below picture. Should I be careful about the copper wire from the brush not to Touch the housing of the generator?
If there is anything I should do in Addition to re-polarizing the Gen, I would appreciate a hint. Thanks!

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The clutch return spring was not really a correct spring, so I replaced that with one that I got from Gerry. Thanks! I also swapped in some new A308 sparkplugs for old rusty (but working) ACR45 plugs.
These cars are individual works of Art that need attention, and personalized effort.

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I tried some LEDs that I got from LEDLight dot com, but are not happy with them. So far all are not any brighter than the good incandescant bulbs that I have. They do have a sharper on/off edge when turning on/off, but as others have reported, they dont fit so well, and are not brighter from what I can tell. Maybe better LEDs from Bruce Blevins would be worth it, but this try was not a success. The electronic Blinker relay I still like, but the bulbs....not so much. Just sharing my experience. -Mike

A couple of months ago I went through my Distributor, and had to replace the vacuum pot. When I added an extra washer inside, it shifted the vac advance.
From my Caribbean Blog page:
Adding the washer shifted the vac advance curve. Before, advance started at 4,5 in, and was all in by 6. Now it starts at 6, and is all in by 9 inches of mercury.

My 359 has not had any pinging under load, with this setup.