Is a Subaru VC always VC??

A question that I cant seem to find an answer on. In reference to a Subaru Viscous Coupling, is there only a P1 (pre 99) and a P2 (post 99 on) VC? The VC routes power fore to aft, or vice versa, but is there a turbo version or NA model? From what I can tell, they would all be the same unit.

I have an 05 GT and need a VC. Been searching but it is either purchase all of a used tranny or just a new VC and pop it in. I know some of the output shaft gears on the back end vary between models and lines. BUT, would a VC from a NA 2.5 Leggy, Impreza, Outback work on a Turbo? How about one from a Saab 9-2x?

Attached are pictures of a used VC I found. The bottom has a little chewing but not sure if this just a file down or red flag.

Looking for options.

Lots of great knowledge on here.

I was able to do some digging and came up with the NA part having the part # 38913AA100. The turbo is the same except AA101. Curiously, the BAja turbo used the AA100 for the first year.

Has anyone done the swap using the NA part?

Viscous Couplings arent a popular topic it appears. :-)

Anyone? Anyone? Bueller? Bueller?