If it has console brackets and full length headlining then the body is a Sandman body. However if the ADR tag says 3 seat capacity it is either a mistake (which is pretty rare as ADR plates were not stamped by GMH) or the tags don't belong to the body. Send me the ID tag details and i'll tell you if they all belong together. Be careful of "factory" rivets, as they can be changed and you'd never know.