Cody what exactly are you looking for. How the plant assembled the complete front end or how the codes reflect to the build. There are also alternate build related information sheets or tags that were used in various plants. So you would like to narrow it down to the 1970 E Body build but there were two plants building E Bodies and could of run different to assembly them.

I have not looked at any schematic on how either E body plant was set up. Likely back in the day they had a sub assembly line for such a build. It would start with the K Frame at the first work station and then a predetermined build after that. The work station would either read off a Sheet for that Specific assembly of the front end or have the information of the build at each workers work station. It also could have other sub-assembly jobs that feed this line. This is were the Sequence number drives the build. Not the VIN. Once the front end is complete I would think it would make its way over to the Main line to be added to the Sequence of build. Not sure how this would be done or if the front suspension build is the main build.