Thanks for the reply, that backs up my findings also. However IF we can prove that the coupe ran ANY cams meeting as a production car or improved prodution car prior to '73 we will be able to get them on the list as a group Nc car. That would be a huge result.
I run a 1600 in Group Nc and I'm looking for a project car to build for a friend and our customers to join the class in. I'm thinking of a 1200 but I'm not sure if they will let me run disk brakes or not. The coupe would be better but it had to have competed in Aust. priour to '73.