This is from the 1967/1968 Camaro Legends Judging Manual. Did not copy photos but the photos are in the Manual
Calipers are painted semi-gloss black. All machined surfaces on the calipers will be unpainted natural metal. The calipers for 1967 and 1968 are a 4 piston design and carry a casting number of 5455533 on the outer half and 5455530 on the inner half. There are two different brake line sizes found on the calipers. It is believed that the early 1967 used a 3/8 inch hex flare nut on the caliper for both right and left. The later 1967 and all 1968 used the 7/16 inch hex flare nut on the left side caliper and a ½ inch hex flare nut on the right side caliper. All of the mentioned lines use a 3/8 inch hex flare nut for the hose end of the spring wound steel line that connects the two together. The caliper is mounted using two 7/16 inch coarse thread black finish hex head bolts and lock washers. With the upper bolt retaining the semi-gloss black painted special bracket to secure the hose using a black “U” clip. The bleeder valve is silver zinc/cad plated and does not use any type of cap. The caliper brackets are yellow cad/zinc plated and numbered 3913798R and 3913797L.
Thanks for posting this. So as far as I can make out:
Rod that holds the brake pads to the caliper -
still unknown phosphate.
I suspect it's either yellow cad, zinc, or phosphate (yeah, I know that's about all of them) edit - just found a nice photo of Chick's 68 brakes and this rod is phosphate.
https://www.camaros.net/threads/time-for-another-68-z-28-to-be-restored.182584/page-22#post-1668891The bolts that bolt the caliper halves together - top one is semi gloss black, I assume same as the paint on the calipers
The bracket that bolts to the caliper the brake hose mounts to with the spring clip - it says the semi gloss black
The bolts that hold the caliper to the yellow cad brackets - are black finish, is that black paint or magnesium phosphate black?
I looked at Chick's 68 restoration photos, but of the caliper mounting hardware finishes are tough to make out.