I'm just showing the front face of the correct clutch for AC cars, without any brass plate in front ( with or without thermal spring setup ), but the full aluminium disipation setup.

About the rest, I think this is going far out of any logic LOL. The horizontal position requirement is just while is storaged, not mounted. Once is mounted, the clutch is vertical no matter what!

Once is mounted that's not valid anymore. Spring will spin, thermal system will spin with fan and pump ( faster or slower, dragging less or more due the temp, doesn't matter ), so I'm not getting the deal of what you are talking about the spring "indexing"... or whatever else you are talking about! LOL