I think I'd rely on actual road tests as opposed to someones thrown together book to profit off the gearheads.
Whenever I look for actual ET,s, on anything, I dont go to " The complete Mustang History" or "The Legendary Camaro SS from Generation One" .
Although said books usually contain excellent photography, the given e.t's are off the hip fabrications. Look to the magazines of the day that performed the tests. They tell the facts as delivered by the tests. And those tests show the COPOS outrunning every other pony car in the field, including the Hemi Cudas and Challengers. Truth be told, the 440 6-Pak roadrunner (69) usually posted better times than the hemi cars. Still, they all fell to the COPO Camaros. If I had 2 COPOS, Id keep one, sell one, and buy a Boss 302, 351 and 429. That would be a great collection!