on a 6 year search trying to find my old 1981. I do not have the VIN and I have exhausted all possibilities of finding it. I ran across a possible car for sale, based on vehicle color combo and options but, when I pulled the Invoice from GM/Allied Vaughn the vehicle options; exterior color, interior color, defroster etc etc on the invoice do not match the actual vehicle with the corresponding VIN. Checked Carfax and no issues on that report going back to 1983. Is it possible that the Invoice as sent to me from AV is wrong or that there might be a revised/corrected Invoice I need to request from AV?? Any thoughts as this seems so weird. Using windshield post VIN, Engine was replaced and cannot find Frame VIN stamp.