I was given a straight 6 that has the valve cover held on with 4 screws along the edge.

Number on the block next to the Distributor: CI46590F54XB

Numbers on the Head: 3835913 GM14,CON 12, L283

What year and displacement?
Is this the "848" higher compression head?

Will this head fit on my 1946 235?

Will this engine fit in my 1946 2 ton?
Thanks Jeffrey