The only difference in the hoods is where the front hood emblem attaches. The difference is the pre '54 holes are recessed for the emblem screws. The '54 holes for the from emblem are flush. Also there is a difference in where the side hood emblems mount. There are 2 extra holes on the '49 - '51 hood for the "3100" emblem. But the front of the hood and the hood latch assembly are the same.
