Welcome to the 'bolt.
If the truck still has the manufacturer's plate on the driver's side door post, put it up here and we can decode for you. Or, you can go to the Tech Tips section and read the article on VINs.
If it is a 1951 3600, the number will start with a 1 or 2 digit assembly plant number, followed by J (for 1951), followed by R (for 3600), then a letter for the month of assembly, and finally a sequence number.
