Hello all! New to the forums. Need help identifying a Dana 60.

Bought this about 20 years ago from Ultimate Rides in El Paso, TX (I think that's where I got it). I had planned to put it in a 1970 Hemi Cuda clone. Haven't touched it in all this time until yesterday, and now I'm trying to decide whether to sell it, use it, whatever. Questions arose pretty quick about what this thing actually is. The BOM numbers on the back of the RH axle do not match any database I can find. But there are clues that point to this being an E-Body Dana. Here's what I know:

1. Wheel bolt pattern is Mopar.
2. Bumper on snubber plate (if it's the original) has Mopar on it.
3. Perch to perch measurement is 46".
4. Tag on exterior differential housing reads "307-69."
5. Ring gear is dated 7-22-69 with 4:10 ratio.
6. The number "60" is on the exterior in two places.
7. Numbers on rear of axle read "2 26 0A1" and "27013 2X".

Pictures attached. Can anyone tell me exactly what this thing is? Many thanks.