Your truck should have the larger 265 engine in it as it is a 1953...J or K serirs...(6 lug nuts)
If it's a "J" series it has a 2 speed Eaton 1350 series rear axle with the most likely ratio of 5.83/8.11.
If your truck is a "K" series 2-1/2 tonner I cannot remember off the top of my head the ratio's offerered...I'd have to look it up.
The K Models used the Eaton 1650 series 2 speed axles...pretty sure on that part.
The axle ratio is stamped on top of the differential case.
The truck model/ wheelbase, HP etc. Is on the drivers door hinge pillar.