Identifying Chrysler Alternators (1960-1976)

It seems this has been a problem since the 60s. That's my interpretation of why Chrysler posted a service bulletin about the ratings and part numbers in 1966.
The tech working on the car and the parts manager didn't have an easy way to figure out what was supposed to be on the car they were working with.
The 1960s service manuals I've seen don't provide a full picture, nor do the parts books.

page 1 here: https://www.hamtramck-historical.com/images/TSBs/1966/66-78_page1.jpg

Briefly restated.
The Production part number stamped on a 1966 alternator, refers to the alternator and pulley assembly.
The 'rating' for each are given on page 2.
https://www.hamtramck-historical.com/images/TSBs/1966/66-78_page2.jpg

When ordering a replacement alternator, one then had to look up in the parts book the replacement part number.

Yes it sure would be helpful to have a list of both production and replacement part numbers.
The best hope might be an old cross reference book, say from the 70s.
I think even Chrysler superceded the lowest rated alternators when replacing them. I forget where I saw that, but thought it was Chysler document like a TSB or parts book.
If so the reasoning is obvious. They could save money in production by making lots of cheaper alternators with the minimum copper needed. Inventorying them probably made less sense especially since the consumer was going to pay for it. Individually the savings in copper per unit was probably minimal.