Technical Identify this Chevy 6 lug rear axle

I got this 6 lug to use for my sons 1950 truck. It was free but I need help identifying the year and gears on it. It supposedly came off a 1970 c10. Numbers stamped on passenger side are TDE 0505W1 and stamped on gear housing is NF3896839 GM 56


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Someone was able to help me. Thanks guys. Turns out I was looking at the wrong chart.


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