ray rays old car, nice car that , he has spent some bikkies on it , i'm pretty sure the cage is cams spec as he was going to use it for the same thing as you . SI rego is as much hassle as normal rego , if i were you i'd be talking to an engineer about a mod plate (i wouldn't be suprised if ray had already done so) . imo if you're not driving it on the road your better off just getting a trailer though (except then you can't really do hill climbs)
oh and trustr32 , it was in the guys shed gathering dust