Engine numbers

[Linda]

I have a cj3a with a  F134 overhead engine. I think it is a 1958 . On the shelf above the water pump is stamped FWP and is also painted on the driver side in yellow. embossed in the block on the passinger side is 807895.on the driver side bottom rear is a square with 1423 in it.the 1 is top left, 4is in top right, 2 is bottom left and 3 bottom right.next to the 4 number square is a H. 4inches above the square is 16. Can someone tell me the year?  AL.      ps ,I tried to attach picture , But no luck!,,
          

[1955CJ-5]

You might learn something here..

http://cj3b.info/SerialNos/EngineNosPlot.html

I have a 55 CJ-5 with the F-head but cannot for the life of me find where I wrote down that engine number...and I think I've seen that mark with the numbers in the corners....