disc brake wheel stud swedge tool

You and I will just have to disagree. You also disagree with the service manuals from that time. Even my "72" 340 Duster had swedged Rotors, so it is not just an early vs late thing.
Well then, post the page from that manual that you have stating the removal, and installation procedures for those wheel studs.
I have factory service manuals that go back to the late 1950's. Motors manuals, going back that far too, Chiltons manuals, Haynes manuals, specialized, Bendix, Wagner, KH, manuals, that don't say a darn thing about a swedged stud, on any of the rotors.
I would like you to tell me the manual, and page(s) from a manual that your talking about, so i can read it, and know, where your coming from.
Care to do that for me (us)?
Safe to say that you and me both weren't on the Kelsey Hayes brake assembly lines putting those things together in the 1960's, so who knows what they did, or didn't do back then.

As you already stated, back in the day, rotors and hubs were sold as a complete unit.
So back then there wasn't any reason to separate them from one another.

I checked an old manual or two of mine and there is just a sentence or two in removing a wheel stud.
Nothing special written at all in regards to removing a stud, so what's the problem?
None, at all.

Like i said in that 4 year old posting that you brought up from the dead, i NEVER ran across a BUDD, BENDIX, Kelsey Hayes, (Mopar, or Ford) Delco Morraine, (GM) disc brake set up with a swedged stud in them.

I think the law of averages in the past 35-40 + years, i would have, don't ya think?
I must have been a mighty fortunate professional mechanic, and enthusiast not having run across disc's like that in my employment.
DRUM brakes yes, DISCS, nope.