The French flatheads were not exactly war surplus but they are military surplus. The flathead engine design was modified by the French military with the addition of governors, metric details (although not all holes are metric), the addition of casting features, etc. These engines were used in frog military vehicles up to about 1990 and were phased out. The surplus spares were purchased and returned to the USA. The engines are a combination of features from several Ford designs. One web location showing pics is
http://www.reds-headers.com/html/ffh.html

The are reportedly cast using a better metal than did Henry use.