How to ID the rear axle?

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Billy the average guy

Billy the average guy

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In another thread I discovered that our Valiant has upgraded 8 1/4 diff and 11” rear drum brakes.
HOW CAN I ID A Mopar AXLE to learn if it was factory installed, or more likely, someone upgraded from a donor mobile? And if the latter then what model was it most like to have come from? Any place serial numbers engraved? Or other ways to ID the intended model?

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Billy the average guy said:
In another thread I discovered that our Valiant has upgraded 8 1/4 diff and 11” rear drum brakes.
HOW CAN I ID A Mopar AXLE to learn if it was factory installed, or more likely, someone upgraded from a donor mobile? And if the latter then what model was it most like to have come from? Any place serial numbers engraved? Or other ways to ID the intended model?

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What year valiant? 73-76?

Jake
 
The fender tag would tell the tale, as would the broadcast sheet if built after a certain year.
There are no ID numbers to certify.
You can narrow stuff down though.
Big bolt pattern in any A body built before 1973 is a tipoff unless you have an ultra rare 1968 HEMI Dart or Barracuda.
The 8 1/4" axle was also a 1973-76 ONLY axle. The 8 3/4" axle was NOT available after 1972, if you have a '74 Scamp with an 8 3/4" axle, it was put there sometime after the car left the assembly line.
 
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