Don Yenko became the COPO muscle car program champion. He ordered the Corvair through the COPO program and created the Corvair Stinger to mount a SCCA road race campaign. From these humble beginnings, the road map for creating the ultimate Camaros, Chevelles, and Novas was established. Factory Camaro V-8s came equipped with the 350 small-block or 396 big-block, which had to compete with the Mustang Cobra Jets and Mopar Wedge and Hemi cars. In response, building the big-block Camaro through the COPO program was devised. At the factory, Camaros were fitted with the 396 engines and shipped to dealers where the 427s were installed in the cars.