1953 ford truck rebuild kit?and engine identification
The 223 didn't come in trucks until '54 so it should be a flathead 6. I don't know much about them unfortunately, but you can try Mac's Antique autoparts for a rebuild kit. http://www.macsautoparts.com I don't have my catalog handy, but if I remember right they have the kit. If it's a 223 ohv your in luck, AutoZone carries the gasket kit and bearing sets.
Tyson