Open driveshaft on all 1955-1st models (the 1954 1/2 ton still had a closed driveshaft). Thus, different 1/2 ton transmissions, rear end, and rear spring mounts.
Painted-grill color changed from exterior color in 1954 to all-white with black inner-bars in 1955-1st. The inner-bar color of the chromed grill was white in 1954 and might have been black in 1955-1st?
