decoding 1968 and earlier fender tags

I can almost decode 1969 and up fender tags from memory, but I really struggle with the 1968 and earlier ones - even with the use of an online decoder. I'm trying to become "fluent" in '68 and earlier tag decoding but it's just not coming together for me ... yet. So I need some help, someone to teach me the rhyme to the code.

This friday, Feb 7th, I'm going to look at a '68 Barracuda Formula S 340 fastback. I'm not really sure what I should be looking for on the fender tag to verify if it is actually a factory Formula S car or not. It has a "P" in the VIN so I know it's an original 340 car, but what else should I be looking for on the fender tag?

Here is the '68 and earlier fender tag example from the MyMopar website. Yeah, I know it's for a Coronet, but what codes should I expect to see, and in which row/columns should they be for a '68 Formula S 340 fastback?


First thing, look at the last six numbers bottom right. That number has to be on the body in order to attach the plate to the car. The three to the left as you know is the projected build date. Far left will Identify the car style, then eng and trans code. I forget what 53 is on this tag. Hope that helps.