Sporting an all-new grille design over previous model years, the 1951 F1 was part of the first generation of Ford's "Bonus Built" trucks. This half-ton pickup was the first truck in a long line of F-series trucks that proved popular through each successive generation.
There are a few different places on the truck to find the vehicle identification number. The two easiest to locate -- both in the engine compartment -- are the frame rail stamp and the VIN plate. Find the frame rail stamp on the top face of the passenger-side frame rail near the motor mount. It's also stamped into a plate and riveted to the firewall.
In early September 1951, Ford started using a rating plate that replaced the old rating and patent plate. Find the plate mounted inside the glove compartment door. The truck's VIN is stamped on the top line of the rating plate.