Build sheets

Hi guys I am new here but I have a 1970 454ss. I will put a pic up when I figure out how to post. I been dying to find a build sheet in my car but have not yet. I have looked in doors under seats under the back seet I found a hand wrote code glued to it. I really want to find it I know it was built in Ar Texas and I have heard they didn't put many in them . Is there any other spots to look ??? Thanks OZ

I've heard they put them on top of the gas tank...