Keemo

The VIN number on the VA.title doesn't match the VIN plate on the door pillar of my 1950 Chevy Convertible. I understand that they used to use engine block numbers on paperwork, but the original engine is long gone. To get the car registered in Ca. I need to find a secondary VIN number somewhere on the car. The body tag under the hood won't work. The CHP says the frame is stamped, but all my research says that the frames were not stamped until 1952. The officer says if I can't find a secondary VIN to verify the door pillar number I can't register it. So my question is where else is the VIN located on my 1950 Chevy Convertible? Can anyone help me?