I know the journey. I took about 18 months to get mine on the road again and I have a long ways to go yet before I finish off my wish list. Lots of projects waiting for money
I am using a Spicer 1310 ujoint and flange at the t-case. It didn't clear the trans pan lip and side of the pan. I had to grind most of the lip off that area and use a low profile fastener in the corner hole. I also tapped the pan in until it hit the valve body. I had to clearance the front corner of the pan as well because when I cycled the suspension I only had about an 1/8" of room. I didn't want to take a chance so I made some more room with a hammer.

I am guessing your split case makes a big difference in clearance.
I doubt I would have been able to use a DC since those are a little bigger. Your set up seems to work better. Do you think you need the DC in front? Mine has a really long front shaft. Even with a spring over the angle would be fine. If I were to change anything I would use a 2 piece shaft in front and get rid of the slot I had to make in the skid plate for the shaft.