30, 41, 46, 50 amp alternators? Yeah RIGHT

townsend said
The following explanation relates to the 1974 parts catalog.
The 403, 404, 406 and 411 alternators were all serviced by the 3780588. The 34 and 41 amp alternators were replaced by the 50 amp alternator part # 3780588.
You couldn't buy the original 34 or 41 amp alternator or the component parts. Only the 50 amp was available as a replacement. All of the component parts listed were for the 50 amp: 3780588.
So to repeat ; 403,404,406 and 411 were replaced by the 3780588- 50 amp alternator and only the component parts for that alternator could be purchased.
Chrysler doesn't clearly explain this in the parts catalog.

Thank you!
That confirms what I had posted previously as a possibility.

Syleng1 said
Also let’s not forget… chrysler had many vendors for the same part. Each vendor probably had a guaranteed output. All the parts assembled the same. But one company stated theirs was a 37amp output and yet company B said theirs would do 50amps. (Not 50 all day long but marketing highlighted it could so that was it) At that moment in time, what was the actually amp requirements for the car. Other than towing a trailer the amp requirements were low. One speaker radio, lights and ignition and maybe a blower motor… that’s all.
And don’t even bring in rebuilders because they are using all Chinese made replacement parts now. That throws a whole different variant into the mix.
Syleng1

I don't think that was a problem within Chrysler production. I do think it is a problem with aftermarket replacement alternators.
I suspect Chrysler had a method of rating their alternators whether it was made in house or not. Other than the few specialty Leece-Neville and Motorola alternators, I think there was only one vender for Chrysler used alternators of the '60s through mid '70s. Name escapes me right now - but the casting on those have their logo on it. In any event Chrysler controlled the specs both in terms of components and performance.

str12-340 said
why don't you just take the 2 alternators (assuming they haven't ever been rebuilt) to a rebuild shop and ask them to test the output. When I realized the potential damage to the rest of the electrical system from high amp alternators (a potential fire from my 100 amp alternator 'improvement'), I started taking old alternators to a rebuild shop, having them find one with the correct output, and getting it rebuilt at that output. It amazed me how high the output from some of the parts store rebuilds were...

Its great you found a shop willing to work with you. The two shops around here were not that helpful. One the guy was real grumpy and the other very nice. But both just tested if they 'worked'. The grumpy one had the setup to do an output vs. rpm test but he wouldn't even do a Chrysler FSM test (15 V with the equivalent of 1250 engine rpm).