The only thing I know of being different is the seat adjusting mechanism. Earlier AD trucks use a cable system, that later changed to a rod connecting the two sliders. Although the Master Parts Catalog lists the seat springs assembly for 54 as different, but I don't know what the difference is.

Last edited by klhansen; 07/01/2026 9:36 PM. Reason: added clarifying info in bold

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.