That looks like it is Dennis Obrien (Albury /Wagga area)
He later purchased the White Tony Roberts HO2 that rolled at Bathurst on top of mountain in 70 and converted it to HO3 and painted same colour as cars in your pic ran it at Calder and Sandown etc. Not sure what he had after that.
Tony Roberts HO2 ex Bathurst 1970
Oldrace photos pic