The radius inboard of the headlight opening is definitely sharper on earlier fenders.
Here's a pic for comparison with Brad's.
One could modify the later fenders, but it might be easier to swap them with the earlier ones. '54-55.1 fenders are likely scarcer than the early ones. If you find someone with a 54-55.1 who desperately needs fenders, you might be able to get some decent early fenders in a swap.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.