Hy Beaster, welcome, a 1953 9700 series would have left the factory with a 248 GMC engine, your truck is powered by a Chevy engine. This could mean that the truck has had an engine swap, or it is actually a 9500 series which was powered by a Chevy 235. If you could post the trucks serial number that would help us to figure out just what has happened, hope that helps.
