The rear end was in my cuda when I bought it. I pulled this rear end out, and using a thread on this forum that lists dana numbers, I was able to isolate that it's from a 68-69 b body track lock 4.10 car. The original owner had told me that it came out of a pickup truck, so I called him to ask him how that could happen. When I did, he said "Oh, ****! You're right I forgot. I took the ring and pinion out of a truck in the junkyard. The rear end came out of my buddy's old '69 hemi road runner."
so, proof? Not exactly I guess...