Look for captains bars on the block above the starter. You likely have a '53 Blue Flame 235 from a car which originally came with a Powerglide engine.
This is a great engine for your truck. Aluminum pistons, hydraulic lifters, full pressure oil system, insert rod bearings, water pump located in the center of the radiator, and you have the highest compression head Chevrolet ever put on a 235.
I have this very same setup in my '50 and it is a dream to run. This engine originally came with the early 2 acorn hold down nuts for the valve cover. Your 848 head will have the 4 holes threaded in the head for the later valve covers.
Carl
