As posted above, the Engine Serial Number that is pressed/stamped into a ledge in the block, forward of where the distributor goes into the block.
Find and post that code and members will help to "decode" it.
Post the vehicle identification code that is on the metal plate on/in the door jamb.
Find and post that code and members will help to "decode" it.
If you have a 1954-1963 Chevrolet truck,
here are the locations of those codes.