I have reproduction 1970 Cuda door glass that was purchased in 2007. This glass is etched with the date code and the PPG logo. This glass was originally purchased from an auto glass company in Michigan by the previous owner of my car. I am trying to install the glass and it will not fit properly, it appears that the curvature of the glass is too flat and does not match the curvature of the front window track. The glass binds up and will not roll completely up or down because the glass comes into contact with the front window track at the top of the glass.

Has anyone had or heard of others that have had fitment issues related to reproduction door glass? Should I assume that just because there is a PPG logo on the glass, this may not have been manufactured by PPG? Who is the best vendor to purchase accurate date coded door glass from?

Thanks.