that is the head #. The engine block # will be down by the distributor. xxx848 is desired. Google chevy 6 cylinder engine identification and you will find a number of resources.
Send more pictures of the truck as well. We will get you started.


~ HB
1966 Chevrolet K-10 | Ghost: formerly Flappy Fenders | In the Stovebolt Gallery
1962 Chevrolet C10
1962 Suburban