So there ia no other numbers or letters on the pan rail below this number. I believe it falls into a 1970 Vehicle. I do not have that serial number written down for a 1971 Hemi E Body, but that does not mean someone might. Barry Washington or Dan Paush on moparts collect 1970 Chrysler information and they might be able to shed more information your way if a 1970 Hemi Built black. To bad you dont have that one number ahead of the serial number you posted. 0B187972 or 1B187972.