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No idea of the subject build date but if any help for comparisons etc, here's a 2016 Mecum sale link below w/ the Canadian delivered Orange LS6 also discussed in other threads.
He may drop by here first but if not, sYc Member Rick Nelson mentioned in the auction link below is probably the best person to hook up with for more info on these special cars...
https://www.mecum.com/lots/SC0516-24...-chevelle-ls6/
~ Pete
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