Hey,
I really do not know. I'm only 21, and was not even a though in my parents head when these things were being made.
By no means am I trying to pick a fight. I'm just curious really, somebody said no one cares, but I kinda want to know the actual history on them.
I found that, and I posted it and wanted to hear your response, ya seem to know a lot about them.
I'll give you the benefit of the doubt and say that in all the actual mopar books that I do have, I can't find any reference to a 413 made after 73. I just found it interesting that like 5 different websites all posted that, but given the state of the internet, that doesn't mean a whole lot.