Was at the junkyard and saw a set of LS1 rear brakes. Does anyone know if the parking brake from the LS1 can work with the C5 rear rotors and calipers?

I was climbing around under my 68 yesterday and noticed a yellow sticker attached to my parking brake cable on the passenger side just in front of the right rear tire....just in front of the attachment bracket. The tag is about 2" long and about 3/4"wide and wraps around the cable and reattaches...