How much time should glass and body parts predate

[Baldy]

I worked at the Fisher Body plant in St. Louis for 18 years, starting in 1955. Two of those years I stocked the glass line. We started to unload glass two week's before the line started. We stored this glass for emergence use in case we had a glass car that would be held up in some way. So you see the first in could be last out.So goes your date code theory.