Not sure if this was discussed before, but I wanted to share some pics. I started to notice a few number stampings on my body panels. Most start with an “H” then have two numbers after. I even found some on the window regulator supports. These are all I’ve found so far..
“H11” Left door jam, between door hinge bolts
“H12” On firewall. The HVAC part of firewall
“H16” Right door Jam. Just like H11
“H17R” Lower Right subframe support on firewall
“H13” Right window regulator channel, 90 degree support bracket (both brackets H13)
“3H” Left window regulator channel, 90 degree support bracket (R stamp from me)
“H50” Left window regulator channel, 90 degree support bracket (R stamp from me)

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Date codes? H17 ---> Aug 17

I've been told that the number is the week of the year. I'm not sure about the H.

Found the answer. Date codes. Look to the very bottom of this link

http://www.camaros.org/numbers.shtml#67Codes

Very cool, something to look for next time to see how original my panels are.

Sorry, they're "Sheet metal run numbers" from the factory.
Larry- if you replaced some sheet metal, you could always try and match the stampings. Guess it just depends how correct you want a restoration to be..

Kyle

This does go to Amervo's point of what a true concours restoration really means.

or "honest"..lol

Never that correct. Just thought it would neat to see how all the dates lined up.