52 Carl, The pre 54-55.1 have a extended arch to accommodate the split ( called a yawning grill), A 54 hood will fit I understand pre 54's but, not the opposite. Any Bolters want to chime in.Doc
Wouldn't that difference show up when a '54 hood was installed on an earlier truck with the earlier grill?
There are a whole bunch of ODSS Stovebolters who have seen my '49 with the '54 hood at Homecoming a little over a year ago, and the only one who mentioned that it was a '54 hood was Grigg (he has an uncanny eye for detail), but he based it on the front badge, not the fit.
I do understand why one would conclude that it couldn't possibly work due to the upper yawning grill, but it is an optical illusion. The hoods are exactly the same where it matters.