Factory front disc brakes for early FGF's and Camaros included the notorious 4 piston calipers. They were prone to problems and the parts are very tough to find because they were so rare.
The majority of the front disc brake conversions center around the later model 1 piston caliper/11 inch rotor GM setup that came on a great many GM cars. I installed one of these kits on my '67. I was under the impression that the 1 piston type was 1st offered on 1969 Firebirds.
Despite the red paint, I see 1 caliper in your photos. I went to Ames website and they only show the correct '69 caliper from the backside. You can make a comparison and see if these look like yours. If so, you can start your search by assuming you have the '69 type so you could tell them at the local parts store that you need brake parts for a 1969 Firebird.
