Personally I believe any externally regulated smoke generator is a waste of diagnostic effort and resources unless you are going for the Pebble Beach top award.
In every Alternator conversion I have done I chucked all that kaka and ended up with a single wire to my battery and no worries (for 1-wire alternators).
If you really want the "amp" light to work, choose the "2-wire" version of the alternator and be happy (light from "amp" light to field fitting, heavy wire from output to battery).
Lighter, cheaper, less complexity.
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Mike!
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