Choosing the alternator is simple. I feel that sticking with good heavy duty older alternators produces satisfactory
results. Get an externally regulated 100+ amp alternator and stick with a common type ie. Leece, Prestolite,
Chrysler, etc... The brushes should be externally accessable so you can apply power directly to them. I like Leece
Nevilles for this and also for the ability to tap into 3 phase from the outside. A good 160 amp small case Leece (Prestolite) can
be had for 50.00 on Ebay.