8 3/4 question

well guys I have been trying to learn about rear ends here, specifically 8 3/4 units. I was told this car i got for parts had a dana posi with 4:10 gears. I learned pretty early that it was not a dana and was an 8 3/4. I thought that's OK, 4:10 8 3/4 unit would work just fine! Well I have finally taken the unit out of the donor car and disassembled it for ID. I am pretty certain that it is a 3:23 open unit - surprise, surprise! Anyway I am posting some pictures to ask if one of you can verify this conclusion for me.

I have learned a bit about these units along the way and learned (once again) that if you haven't seen it don't believe it ](*,)

I also have posted a picture of the inside end of one of the axles since during my investigation someone mentioned tapered units and I was not certain of this was tapered or not. Please someone who knows if you could look and help me learn some more it would be appreciated.

Also, thanks to all who have been so much help in my most recent education.]:-)