3:73 gears are the most common in a 2wd rig.
Although I got lucky and scored 2 14 bolts with 4:10's out of 2wd rigs.
My 73 C20 and 81 C20 Burb have 3:73 gears.
4:56 gears are generaly found in 1 ton rigs and they are usualy military rigs.
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78 K5 on 3/4 ton axles.
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69 K5, .060 over 350/465/205.
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