Matt,
Found this on CRG Site.
Maybe what you're looking for?
Hope the link works.....
Ok, the attachment didn't work...
Here's the link to CRG..scrool down to the 67-9 cowl tag de-code, and look at field b/g.
http://www.camaros.org/numbers.shtml#CowlTag
"The LOS (Los Angeles/Van Nuys) scheduling code was a letter followed by one to three digits. It does not decode. We believe the code was used at LOS to aid Fisher Body in scheduling the body build order."