Just checked in and glad to see the post. I am unsure of the validity of the build sheet(s) and the window sticker is for sure a reproduction that many cars have for show. I thought it would be best to delete those photos and sell it as it is! 1970 LS6 that is a VERY VERY nice car, and presumed to be earliest LS6 off the line at the Lakewood assembly plant! Thanks.