I've noticed the prices in the White Book. It's a wonder they sold any headers at all. In 68 for example, $400 (round numbers) for the basic Z/28 package, or $779 with headers, assembly required! Probably could've got Hooker or Hedman for less than $50 ?
I guess the drawback was, one would have to wait a year or so as it probably took aftermarket a short while to develop a set of headers for the new Camaro....Then again, Maybe Nova headers would fit without modification.
JL8 is interesting indeed...Thanks again.