FYI: You can go to www.GMmediaarchive.com if you have a 77 or newer Olds & get a copy of the original invoice, including a breakdown of all options as it was sold, for $50.

Not "as it was sold" but, as it was delivered to the dealer. It will not include any items that were added by the dealer, prior to the actual sale.

Although the "window sticker" and/or the "sales invoice" would more desirable, a copy of the "factory invoice" is a good substitute.
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Norm