Would that mean that everything would also have to be positive ground and the starter motor would spin the opposite direction and have a positive ground radio, the wiper motor would turn the opposite direction and park on the other side, plus the heater/defroster fan would be turning the other direction and on and on and on??? There has always been a myth about Chrysler electrics being "different" so I think this guy has bought into something? Be careful how you break it to him, could get weird or dicey, social distancing rules apply here for sure