[JoeC]

Kevin, You have a good eye. It does look like a Yellow Yenko Camaro and to the pass side of the 57 Chevy looks like another '69 Z/28.
In my previous post I was not referring to the 8.5 x11.5 Chevelle type build sheet. I was looking at the GM documents titled "Body Broadcast Copy." There are a few copies of these in the Camaro books. They have lines of boxes with codes and on the lower quarter of the document is an open space where there are special codes and sometimes instructions. This is where the COPO codes are listed. For example one is for ZL1 Camaro no. 2 and has typed in this space "SHIP 12.30 ESTES REQUEST RED HOT PILOT 427 ENGINE OPT 9560BA." Some of the other sheets just have the COPO number. I believe some of the Novas came with this type of "Body Broadcast Copy."
Did Gibson restore your car with an SS grill and steering wheel? That's what it looks like in the pics I have on the computer but they are not that clear.