I think you should still try to find the number stamped on the axle tube as you seem vague as to what the rear end came out of. The number should tell you year and vehicle. I found this info useful when I bought parts such as brake shoes. In may case, I tell the parts guy that the parts are for a 1978 Camaro with posi. It wouldn't be useful to tell him that I want parts for a 54 pickup as they won't fit!


Gord 🇨🇦
----
1954 1/2 ton 235 4 speed