Cowl Plenum breather identification???

[Zedder]

3 or 4 years ago, I bought a cowl plenum breather set-up from another SYC member and never bothered to open the box as I trusted his description and it was packaged so well that I didn't want to mess with it until I would need it one day (I know, mistake number 1). Anyway, I never did use the breather and ended up selling it to a member here a few weeks ago. He recieved it and agreed that it was in excellent condition...however, it is not for a '67 Camaro as I was told when I bought it. He thinks it is a very rare piece for a full size BB Chevy, but I have no idea what it is??? Can anyone help? The pics he sent me are too large and in bitmap format, so I can't post them, but I would be happy to email them to anyone who knows about these things. At this point, I'd just like to get my $3,500 back out of it again and chalk this one up to experience However, I can't advertise it until I find out what it is! Thanks for any help that you might be able to provide