Need Help With De-Coding

[idaho32]

New to the site but I am in need of a little help. I currently own a 71 3/4ton and when I bought it the owner had the original parts identification sheet and I also believe the original window sticker. Both are in pretty bad shape. Anyways about my question, is there any website that anyone knows of that explains exactly what options these trucks came with originally along with the codes. This site has been great but for some reason I am not able to find all the information I am wanting. Thanks in advance.