Decoding a 12 bolt

[Crank]

   Finally found a 12 bolt posi out of a Chevelle. Can someone help decode the number on the housing the guy sent me?

#3917124.    It’s a long way from home and comes with no gears. He’s asking 1k CAD. Seems like a lot, but have to purchase without be able to inspect it if I want it. Been looking for ever! 

[MC1of80]

Crank, ask for the numbers and letters off of the left axle tube. All others are casting numbers. 

[jft69z]

That's a casting number. On the passenger side axle tube, facing the front, there should be a hand stamped set of letters & numbers. Try to get that number and we can figure out what it came out of.

Here is some good data too:

http://chevellestuff.net/qd/rear_axle_info.htm

EDIT: Tom beat me to it while looking for the Chevelle site link, lol.

[Canuck]

https://www.firstgenmc.com/forums/index.php?/resources/decodingrearaxle/

[MC1of80]

Ummmm. Silly question, what does it matter how the rear was "born"? You obviously have to rebuild it the way you want.

Unless you are looking for a numbers correct rear for your car will the numbers matter. 

Just asking....

Bottom line is that it is a 12 bolt.