yes for 1969 Camaro, where is this info posted on ECL's?
It isn't and may never be. Kurt and I have been working on this for many years and have figured out some of it. ECLs are highly sensitive to option content and were likely used to generate engineering bills of material, pricing, and labor content for production scheduling. Also, they changed over the model year. The engineering content for the 12 COPO 9737 ECLs has been known for decades. From a engineering bom standpoint, several of them are identical. Something else must be involved.
There's a lot to learn. D55 has at least 19 ECLs, 30 for Z22. That we know what some of them are makes it easy to spot reproduction paperwork when it is presented as original. There is a Z/28 currently on ebay with a reproduction window sticker advertised as being original.
Kurt is also working on Broadcast Copies.
We need original paperwork to keep working on this. If you have an original window sticker or broadcast copy please share it with us. They are for our reference only; we don't circulate them. Also, if you have acquired NCRS shipping info for your car, the VIN and production date is useful for production calendar research.
Feel free to post or pm data to us.