It appears to be universally agreed on the CRG research postings that there were no front or rear spoilers factory installed in 67. I have 3 questions about that. (I suspect they've already been answered on here before, but I couldn't find it. So feel free to start any reply with "Dear Dummy"
1. The 67 Assembly Instruction Manual has option D80 listed, with diagram of how to install the front spoiler. The sheet has release date 11-30 (presumably meaning 11-30-66). It also says to see RPO Z28 for "rear body extension". If the front spoiler was never available, why is it in the AIM and not marked as "cancelled"?
2. The Z28 section of the AIM, sheet B2, shows how to paint on the Z28 stripes, and it has a "View C" depicted for "RPO D80", showing the rear spoiler, and a "Section A-A" showing where the stripe stops on a spoiler car. The Revision Record at the bottom of the page says that View C (spoiler) was added to the AIM on 12-15-66, and that the Section A-A (spoiler stripe detail) was added on 2-16-66. If the rear spoiler was never available, why is it in the AIM and not marked as "cancelled"?
3. On the CRG research topics page it is noted that the decklid changed in approx. March/April of 67 to add the spoiler attachment cutouts in the substructure of the decklid. It is suggested there that this was the "introduction of the 1968 thrunk lid support structure" to the 67 trunk skin. Couldn't it be that the holes were added to simplify mounting spoilers on 67's, rather than just gearing up for 68?
OK, I'm ready for y'all to educate me now!