I think this is a very early build but I will let Jon Mello tell us more about this Z28.
1st picture: Californian, Z28 and Cherokee: The metadata for this image states, “1967 New York Auto Show UNITED STATES - APRIL 05: 1967 New York Auto Show. A variety of Chevrolet Camaro's on display at the New York Auto Show. (Photo by Bob D'Olivo/The Enthusiast Network/Getty Images)”
https://www.gettyimages.com/license/163091838 2nd picture: cropped version of the 1st
3rd picture: Rear of Z28: While I’m not positive, this picture was most likely taken at the Auto Show in New York because the color of the car is the same, the license plate matches the above picture, and the car is sitting on a floor/ramp that looks to be the same as in the above photos. (courtesy of CRG Member Jon Mello)