I don't see 'Z28' in that picture (I have the book, no scanner). Looks like it is just an intermediate design from when they were trying to figure out the design of the rear end. Look at the orange car in front.
Note, if I've gotten any facts wrong in the above, just ignore any points I made with them
Quote: In 2014 the camaro will have ... a twin turbo v6 ... around 350 to 360HP
No. Let me repeat that. No. FbodFather
Camaro5 Fest sub-forum