Self professed expert but he filled a information void and made it his living for years. He has been compiling Mopar production and option information for decades. He put together the pocket part number guides and option book for Mopars from the 60's into the 80's. If you pay him he will fly to your location and authenticize your car or a car you are wanting to buy. Not a bad service to provide for people that have the cash but not the know how when buying a mega-dollar Mopar collector car.