I've seen a fair bit about these Aussy V8's and I like it... What championship is it?
Can you explain why they are doing it? Other than loads of torque in the wet. It doesn't strike me as the fastest technique.
I did a track day at Bedford Autodrome in the wet a while ago and it was great fun keeping the car straight in the rain, but still letting the back go a bit. I had more fun doing that than I used to actually drifting.