73 Dart Alternator doesn't show charge anymore.
Uhg. I'm pretty cynical so would say it's not worth spending the time and effort to install IF you have other choices.
The ole' switcheroo trick is all about reducing inventory and increasing profit. The revised squareback will physically fit, sometimes with a little more effort or straining the wires to hook up. That's not their problem.
Also, its hard to be sure, but like you, I'd expect a the rotor to spin a bit more freely.
One reason may be the rear bearing is pressed in too far. This one got so hot it changed the color of the steel case.
This is the one I cleaned up spinning like a top.
https://www.forabodiesonly.com/mopa...ulley-on-an-alternator.550804/post-1974483703
Squarebacks use these brushes and holders
Revised squarebacks use a different horizontal brush insolator
