Using the two of the Stovebolt VIN decoders, the VIN translates to a 10/52 build date, made in sunny Los Angeles (Van Nuys.)
You might have an assortment of other year parts on it, but typically the VIN trumps all. Since you're titled as a '52, and the VIN shows a '52, I would call it a '52 regardless of the pedigree of the rest of the truck.
Bill