Hello! HELP trying to figure out what year my flat head is in my 1938 coupe' on the bell housing up toward the block there is a circle, and all I can read in it is a 9 to the right of the circle and aprox 1 inch to the right of circle are three large stamped letters X12 larger than 1/2 inch stamped. It passes the pencil test above the timing cover, has raised intake, has raised exhaust ports , 24 stud, water holes one rectangular and the other two are trapazoid in shape , some letters and numbers on the surface of intake manifold under the gasket right rear no order F,C and a S in a diamond. Looks like this block is or was only silver in color?? Hope some one will read and have some help or answers Thanks