Kienan,
I tried to check the rules for their entry conditions and it more or less says that, eligibility is as per the procar series or by invitation!!.
Would sort of suggest that HRT = CAMS = Holden. Seems a strange way to have eligibility set up.
Also strange that the local broadcaster had the Brocks'tenth win at Bathust set up and played time after time after time.
Just one more thing to ponder about CAMS
Kenn