I’m no expert, but logically the engine must be produced before the vehicle is sold, so I would think it’s a ‘54.
There are other identifiers to engine year. One of our own ‘bolters “Pre ‘68 Dave” is an expert on these Stovebolt engines and has a website that show the differences thru the years these engines were made. Click on his presentation to open it up.
Here is a
link.
