That’s an example of the last US production run of Ford flathead engines from 1949 to 1953, designated 8BA, with 24 cylinder head studs per bank and a capacity of 255 cu. ins. (4184 cc.) from its 3.3/16″ bore and 4″ stroke. Those engines were also made under licence by SIMCA in France for their military vehicles, and this engine has all the signs of being French – the cylinder head markings, the paint finish and the cast-in boss at the rear of the left cylinder bank which housed the governor and hour meter. The square black oil union looks French too.