Sweeeet Camaro!!
This is the caliper You are looking for.
http://www.wilwood.com/Search/PartNo...desc=Mech Spot
I have them on my car,.... not very happy with them though.
It will not hold the car on a slope.
I´ve also tried to modify the bake pads, but no improvement.
Now I have hydraulic parking brake. Works great!