Mustang Man is right. At least in Kentucky, the state provided the official VIN plate and they were very specific about where it should be mounted. It has to be visible so, on the hotrod, this meant installing it on the door jam on the fiberglass body. If you mounted it to the frame where they want it, it would be hidden by the body. I had the VIN number assigned by the state engraved on the FFR plate and then mounted it on the firewall on the drivers side in a very easy to see location.