Looking for a specific 340 Dart in St. Louis

first off welcome aboard. second do you have the cars vin number? if you do thenhave you tried going to the mo. state dmv? call them and ask if they show a record of the car being still licensed for the state. if it is still there you may be able to get more info on it. if it left the state ask the dmv person what state it went to. sometimes they will tell you alot of info and sometimes they won't. it is worth trying anyway.