I'm gonna say they're 1-ton judging from the distance between the front and the next stake pocket near the fender mounting. Also '54-55.1 from the fact that they have flat tops. I think I saw that the embossed areas for fender mounting are '54 only, but can't be sure about that.

Kevin
1951 Chevy 3100 work truck
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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.