The raised numbers. 3835309, is the casting number for a 1948-1949 235 engine.
The 1942-1947 235 engie ad a 3835335 casing number. There were a number of improvements made in the 1948 engine although most gaskets are the same.
MS is a 1942 160 inch wheel base 1 1/2 ton truck.
1110090 is a number for 1941-1948 distributor, 216 or 235. The 5B2 = Made the 5th day of Feb., 1942.
The lack of and engine number being stamped indiactes a new replacement block was installed some time after 1948. The 1948 block was sold for replacement for the 1941-1949 235 after that point.
9M indicates the truck was assembled at the Norwood, Ohio plant.