In late 2005 I tried getting a blank build sheet for my '71 from Vintage Auto Literature and Manuals but they could never deliver the correct one as compared to the original that came with my car. Since then I have created a blank build sheet that has the corect format for a Chevrolet built in Van Nuys in May of 1971. Here is the link to a blank JPG build sheet.
http://i291.photobucket.com/albums/ll306/MagicDragon42/MC71BlankBuildSheet.jpg
And a link to a completed sheet for my "71.
http://i291.photobucket.com/albums/ll306/MagicDragon42/MC71BuildSheet.jpg
Mike