[JoeC]

I wonder if any V8 cars with a L6 ID came with duel exhaust? They would be missing the extra bracket if they were built as L6 bodies. In 69 Norwood used two different build sheets called a "Body broadcast copy" and a "Chassis broadcast copy". There are copies of these for ZL1 #2 in the Hooper book. JohnZ had a few good post about this where he talked about the body coming "through the wall" which I think was what they called it when the body came from the Fisher side to the main assembly side. He also said the main number they used was the "Job sequence number" not the VIN. All the numbers had to tie in together at the end including the job sequence number, the VIN, the key numbers, the dealer order number, and the "ident number". The COPO cars had a bunch more numbers. JohnZ also said there were like 15 copies of the build sheet that would print out in different stations along the line. A guy, who worked on assembly in 69 said he remembers sometimes seeing a pile of build sheets on the floor of a car and they would of course through them in the garbage. here is a JohnZ post.
"Because the cowl tag was installed and used by the Fisher Body plant to serve their specific needs in welding the raw body together (from the dash panel rearward), painting it, and trimming it out. It didn't really matter to Fisher Body whether the final car was a 6 or a V-8, as that didn't affect their part of the body assembly process (except for a few things like an extra exhaust hanger reinforcement welded to the rear side rail for dual exhausts or a hole in the tunnel for a floor shift, and they had their own internal special codes for those things that didn't show up on the cowl tag). All Fisher Body supplied was the painted and trimmed body shell from the cowl rearward - everything else was installed by Chevrolet after the body came through the wall.