Superwrench I think why the person asked about putting up the fender tag codes on here is because some codes go with other codes for 1971 Cudas and if a code is extra or missing it could be deemed a posible fake fender tag.

Here is an Example. A62 Rallye Dash on the fender tag goes with N85 Tach on the fender tag for a 1971 Cuda. The M Codes all run in a row on a 1971 Cuda M21-M25-M31-M88. The person is not trying to be an know it all, I beleive all he is saying is we all would like to help you with this purchases fake or real.