Factory markings and codes? HELP

Hi, I am almost complete with my 1972 original 340 4-speed Demon restoration. I kept all the factory markings in tact that were on the rear end. If you think this will help you I can take some pictures with my digital camera an E-mail them to you. E-mail me at
{[email protected]}. My name is Joe Arceri, Long Island N.Y.