Hehe, nice to see someone else from Australia.
Ok, our (Aussie) V6 is slightly different depending on what version your looking at.
Our VN-VR are the Series 1 v6's. BUT from VN Series 2 models to the VR models we have the single peice rear main seal, which I'm informed is something the American's never got until the Series 2 V6s came out.
Once you get to the VS and onwards, our (Aussie) V6 is the Series 2 V6. We just commonly call them the 'ECOTEC'. They have the lower deck height almost other things.
That make sence?
P.S. Your from SC forums?