Why would anyone do this? Because of $$$$$$$$$$$$$$$!!!! This car would be worth about 25-30% less than what his starting price is, without the 4N code on the tag. You don't need #'s matching drivetrain if that tag was legit. To the "novice" this tag would look like it is original to the car. This seller is trying to sell the car to someone that is not in the "know" on when the big block was actually put into production, as he himself "assumed" November was when they started building them. This is probably one of the better attempts to pass the tag off as original that I have seen in a while. What really hurts this car now is not knowing what it was originally. Even for the money the car is tainted without its original trim tag, best to hot rod the car now, then who cares what it was originally................RatPack..................