aggie jon - Your number: B53 848 850 is not an engine number, but the head number indicates it is a "848" head, the desirable head, from 58-62, used on many of the earlier engines to enhance performance.
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself. Operators are standing by to take your calls! Now cruising in the Passing Lane