Ok, I just went out and messed with it some more. There are only 2 holes in the frame, and they only match up to those two bolt holes. There is no holes for the wider pair. Even on the top of the frame.
With the way it sits in that picture, the transfer case is very close to the bottom of the cab. I can't even get my hand in between the tcase and the floor of the cab. I don't think it will go much higher.
I guess it does have to sit down like that, because once I got to looking at it, the bottom of the crossmember is about in line with the bottom of the transfer case, and you'd want something protecting the transfer case. It just seems awful low.

That still doesn't explain why I can't get a transmission mount in. It should have one, right? The adapter plate isn't supposed to sit directly onto the crossmember, is it? I would have to put a body lift on the truck if I wanted to use the transmission mount.

I didn't realize when I posted this that I was posting in a small block forum. I'm going to try this in a 4x4 forum too.

Thanks!