Borg Warner Centre or is it?

[Paul M Bro]

Anybody know what this centre is from and suits, LSD or Truetrac?

Told it was for a late model Commodore V8 GTS, can't find anything like it online, stumped!
Need help to figure this out

 

[_R_J_K_]

Going by the "0578" prefix I'm guessing it's a Borg Warner BW78/M78. Googling "0578-929 diff" brings up a lot of Ford threads, so possibly something out of a Falcon. The 4 dowels would make me think it's some kind of 2-way LSD, but the only style like this I can think of is a Kaaz and that doesn't look like a Kaaz centre.