This photo spread is from the 1969 chapter.
On the left are some rough sketches that were supplied to me by the International Motor Racing Research Center. These sketches accompanied the 1969 Camaro homologation sheet, parts of which they also provided for the book. I'm only guessing but I thought these might have been drawn by Walt Hane, who was head SCCA tech inspector, and was battling the factory Trans-Am teams and their increasingly radical bodywork modifications. Shown here are detailed measurements taken from a stock 1969 Camaro, so they can be compared with the factory race cars.
Meanwhile, the photos on the right page are from Canadian racer Al Mason, who visited Smokey Yunick's Best Damn Garage In Town in early 1969 to purchase a Smokey race motor for his own 1968 Camaro A/Sedan. Thats Al's blue Chevy pick-up that he drove all the way to Smokey's shop and back.