Saw the below info posted on a 'Vette site..
Worth a whirl if no luck otherwise!.
[img]<<GRAEMLIN_URL>>/beers.gif[/img]
~ Pete
<span style="font-style: italic">You may want to reach out to Al Grenning for some help identifing the dealer. Al has GM dealer code and zone numbers that were accurate from at least around 1960 to about 72. I was at one of his seminars a few years ago, and he had 2 large binders (6 to 8 inches thick each) listing dealers by zone and code. He had received them from someone at GM, during one of his research visits.
I don't know what he charges for this service, but he doesn't usually provide it for free. Though at the seminar, he did offer to look up the dealer, for anyone you had their info with them.
Al can be reached at
www.ccas4vettes.com, or emailed at
[email protected] </span>