Your not going to find the VIN on the data (FENDER) Tag of a 68 Coronet R/T Your gonna find the VON, which is on the Radiator support and the trunk rail, the Vin plate will tell you it is a R/T...WS23L8 then sequence #s which are not on the data plate or Stamped anywhere else on the car, In other words the Vin Is NOT stamped on the Body anywhere, the Vin is on the Dash, Motor, and trans..Also on title.Your title should read what is on the Dash, not what is on the Data tag. I have been all over 3 68 Coronet Rts, no VIN on Body, just on Dash, Not on data tag. If the Vin on Dash Reads WS23L8 Then it is a 440 RT, unless someone changed Vin plate on dash..Check # on data plate, look on inside of radiator support, usually middle drivers side, open trunk, move rubber trunk seal, drivers side and # (VON is stamped on truck rail there, these two places (numbers should match bottom # on data plate, if they don't then radiator support has been replace, or quarter has been replaced. to find out if is a #s matching car you have to look for the Vin on the Motor and the Trans..Hope this helped you some