Thank you Jon.
This is very interesting. I guess the Girling would be superior to the JL8 but is there any mean to get a proof they have been used on a first gen Camaro back in the days ?
I'm not sure I will be able to find a picture of a Girling caliper on a '67 Camaro in Trans-Am but if you look in the rule book thread, http://www.camaros.org/forum/index.php?topic=7850.0
, the SCCA GCR's say under 6.1.a Automobile Eligibility, line 1 a, your '67 Camaro is an eligible FIA and Trans-Am car. Under section H) Brakes, line 7 says the type of brakes you use are free (unrestricted) as long as they are mounted in the stock location.