I'll agree with you when there are concrete rules regarding what can/can't be done.
From where I'm sitting it is a shamozzle and geared purely to let EVO's be the only competitive cars
the 3500cc rule makes anything but RB20's ineligible
same with Supra's, 2.5L WRX's, Commodores, Falcons, Porshes
Street rego/Street legal but there are GT2 cars entered
I'm sure the event will be great for spectators and I will try and make it down to watch but is a massive head f**k for anyone trying to enter