I'm trying to document my 1970 GS455 convertiblevin 46670H228983. I've checked with the Sloan Museum Flint but they don't have the documents supposedly due to some fire @ Buick offices years ago. i've heard rumors of a gentleman that has ownership of the said missing files and will send copies for a fee. I've contacted this guy without response. Hopefully one of you knowledgeable guys can help with the search for any Buick factory documents for this car.
Do a search for Wayne Roberts on here, he has what you want. and the Sloan Museum should have given you his info.