3.73 gears

What year truck are they from, how many miles, what general condition?
 
I don't know what year they are from I bought them from Mark Nixon on here but changed my mind about re-gearing. They will fit the 11.50 axle. They are in good shape, except the end threads on one of the pinion shafts is a little messed up but could be fixed with the touch of a grinder. I'm in east TN near Athens.
 
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