I've been to car shows and have seen a couple 68's and 69's that would have a sign by them saying 1 of 285 (just picked a #) made with this color and options. How do you find this out? I know they made around 3600 67 400 convertibles but how do you narrow this down more? I have registered my 67 with PHS and received my package with alot of great info. is this something they can help with? Thanks for any help.