I agree this is a 1951. A simple check that sometimes works if it's all original is to look ate the date on the radiator. Harrison put a code on there that ends with the year ie: 51, check it out. There is also a date stamp on the Harrison heater. another easy look is to see if you have an 80 MPH or a 90 MPH speedometer. They changed out the speedometers in late 1951. If you have a title, it should have the year on it unless someone put together an old truck from pieces and used a title that they found.
Your pictures If it's titled and your not trying to make a show truck, it doesn't matter much if it's a 1951 or 1952. Most parts will interchange and they look very similar. The engine you have is a 216 babbit bearing engine. Many bolters have changed them out to the full pressure 235. If it runs well, leave it alone for now and just get it on the road and enjoy!
