Rear end id

What rear end is this?

 

8.5” 10-bolt out of a 71-72 Cutlass/442 built in Lansing Michigan. It takes the same guts as the other 8.5” 10-bolts.

 

Thanks

 

Unless it is a wAGON... Bigger axle bearings. A10

 

Yes,the Vistas have the larger A10/SET10 bearings,but the flat-top wagons still had the A9/SET9.