This is all good input. Buyer beware! I still think a list of factory part#'s with their amp rating would be a helpful starting point with the caveat that the only true measure would be to spin it up and see what it will really do. A person would need to glean info from all the parts books to make a master list. And no, I am not volunteering.
If we could find that information I am sure it will get posted. The Galen Govier books are probably the most complete as far as part numbers go and of the 3 books I have, neither have any alternator information.