first48 welcome to the Forum...
The VIN Buster did decode your truck as
Serial # : 6FSH2035
Mfg Date : August,1948
Model : 1 ton
Wheelbase : 137 inches
Plant : Oakland,
Block casting number, raised numbers found at the upper right of the starter, if you post this # we can tell you more about your engine... The E218 = May 21 48 if it is a 216 ... A 216 will have two studs coming out of the top of your valve cover...