cowl stampings???

[Kurt S]

I think Jeff must be right, they really didn't mean stampings. Stampings would be too small to see.
Most of the firewall writing is actually between paint layers since the colors / option writing were for Fisher Body. They are generally only visible when the firewall is being stripped. The rotation / sequence # was on the top coat of paint since it was used in the assembly process.

[x44d80]

My car had N10 chaulked on the driver side firewall just below the X stamped part in the sheetmetal. It became visable as I was blasting off the black paint so it was on the bare metal. I've heard from someone else that a ZL-1 car had zl1 chaulked in crayon on the fender extensions. Ed could probably verify this better than me because on that my info is 2nd hand.