First build dates for single piston calipers

[Redneck]

Does anyone know when the first single piston calipers were used on Camaros??? Everyone knows 69 but--- whats the possibility of a very late build 68 having the single piston type calipers??? My car has 2 pc rotors and single calipers and looks like it's never been touched but??? Any help Thanks

[Lynn]

Pretty sure they have a date code. Just three digits which indicate the day of the year. Been a while since I looked at mine.

[mr396]

My 1968 is a 07C build and it has the 4 piston caliper.