John had access to a lot of things that were later sent to the GM Heritage Center. Fred Simmonds also looked at a bunch of stuff - I bet they looked at the same stuff. I can't say everything they've looked at is now at the GMHC, but considering 1970 and 1971 GTO colors have been published, and there's a list of 1970 GT-37 colors floating around, I am surprised that no one has encountered a '71 list other than bits and pieces of information from a column such as this.
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