I think (but am not sure) that Chevy and GMC used the same rear ends in '53 and '54. This info is from the 1939-54 GMC Master Parts Book.
You are showing 6 lug wheels, so it should be a 1/2 ton.
1953 used a 4.11:1 rear gear.
1954 used a 3.90:1 rear gear.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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