I recently purchased a 1953-1964 and it is missing the data plates and I can not find the serial number stamped on the frame. I am trying to figure out what the serial number is. the engine serial number is 4FR137896 it was stamped on the front left side of the motor. There is another number that was stamped above where the water pump goes it is 2624X. I don't know if it is the original engine but i do know that is was rebuilt at Mustang Re-builders with a job number of 55096. Any help would be appreciated.