.. 8 1/4 rear end ID ? ..

[mopar66]

i just took a 8 1/4" rear end out from under my '66 cuda to replace it with a 8 3/4" i have .. the 8 1/4" unit has 4.10 gears with a SG .. i will be getting rid of it, but was wanting to know a little more about its original identification ..
it has 11.00" dia brake drums with a BPP ... any ideas regarding what it came out of ?? ..

 

[Bulldozer]

could be a narrowed B Body . could be a later A body with big brakes put on it.

 

[kt340sport]

Half ton truck i bet , they had 11' brakes optional with the 81/4, all the c bodies had 91/4 did they not , i had 2 newports, and 2 new yorkers in the seventies they had 91/4,s . I think the f body cop cars had 11 '' rear brakes with the 81/4 also.