According to your VIN, you have a 1965 C-10 Short Bed Stepside made at the Norwood assembly plant. It was the 23,699th vehicle made at that plant.
As others have mentioned, the serial number will be on that pad near the distributor. The prefix letter will be the engine plant, the numbers will be the date code, and the suffix letters will identify the vehicle type and transmission. I remember writing down my engine serial number and going to a local GM dealer to positively identify my 250 after buying my '66 C-10.
