9" ID info

[Roman]

So I picked up a 9" rearend last week and now I'm stumped as to what it came out of. It has 2 1/2" leafs and I know it's a truck axle, but from what I can find 1/2 ton and 3/4 ton both had 3" springs.
Specs-
65" wms
5x5.5" bolt pattern
31 spline shafts
2 1/2" leafs 56" over all(24"x32" eye-center pin-eye)

[White trash]

2 wheel drives pretty much always had 2 1/2" wide springs.

[79chevy39.5's]

the above is true