[reclino]

So the Porsche alternator is a Paris-Rhone unit, configured with internal voltage regulator, powered off of a "diode-trio". Brushes are wired in the N configuration. Most common failure is the voltage regulator. To get to the voltage regulator the alternator has to come out, but is behind the cooling fan and shroud, absolute pain with no space to work and lots of little fasteners to drop and lose forever. My car was sidelined by a failed voltage regulator......
What to do while waiting for that damn O-ring to ship.
After the second pot of coffee the simple solution finally came to me, with slightly modification to the old voltage regulator and brush pack, I was able to rewire the brushes to the P configuration. This means one brush gets power from the field tab on the voltage regulator, the other brush is wired to ground. So just one extra wire has to come out of the back of the alternator, the Field wire. Now just wire it up like a Ford external regulator alternator.