OK I have progress and questions.  This week I ordered an MC07 R10 dual transfer case adapter kit.  Time to get my crawl on.  

I'm wondering about a few things now:

1.  Do I need to put a CV (or double cardian...same thing?) on my rear shaft?

i didnt

2.  Does anyone have any tips on shortening my rear shaft and/or measuring to find out how short I need to make it?

use a angle grinder to remove the weld bead on the tcase end of the tube, then cut it 6 inches shorter,  i used a piece of heavy paper(some sand paper is what i actually used) wrap it around the shaft  and it will give you a perfect circle around the shaft to make a mark
a LARGE pipe cutter would be the perfect tool

I guess that's all I can think of right now but if you have any advice, tips, tricks for doing this install let me know. 

Thanks in advance! 

Oh...for a short refresher, I have an 87 pickup with Marlin 4" lift and 2" body lift.