Bob, I know you did not ask this but: Seems like if you have updated with 12V, you should go with alternator. Get rid of all the clap trap wiring/charging components under the hood. Much more reliable.
Just compare the number of components, total wire lengths, number of wires and number of termination points sometime. It's time to get into the 60's at least.
"Alternators have several advantages over direct-current generators (dynamos). They are lighter, cheaper, more rugged, and can provide useful charge at idle speed. They use slip rings having greatly extended brush life over a commutator. The brushes in an alternator carry only DC excitation current, a small fraction of the current carried by the brushes of a DC generator, which carry the generator's entire output. A set of rectifiers (diode bridge) is required to convert AC to DC. To provide direct current with low ripple, a polyphase winding is used and the pole-pieces of the rotor are shaped (claw-pole). Automotive alternators are usually belt-driven at 5-10 times crankshaft speed. The alternator runs at various RPM (which varies the frequency) since it is driven by the engine. This is not a problem because the alternating current is rectified to direct current." Source, Wiki of course.
Get a transistor, sister.
Sorry Jerry but as you suspected, here I am. The yang for the yin.
