Ultimately what are your goals:
How much lift? & How much wheeling?
Personally I'd swap to a TTB D35. They are plentiful, cheap, easy to come by, and the swap process wouldn't nearly be as involved and time consuming as a SAS swap.
Especially since a D30 is a boat anchor
With the D35 you will have the comfort and drivabiltiy of independent beams as well as the strength to do some moderate wheeling (with 33's or even 35's if you are a light foot). Assuming you do manual lockouts and 5-750x u-joints.
Don't be worried about alignments as long as you don't lift more that 6". The shops around me have always done a fine job.
If you have the right drop brackets matched to the correct coils and pitman arm, then bumpsteer will be managable as well.
If everything is setup right, alignments and bumpsteer (your two worst enemies with the TTB) will be moot points. This boils down to how much lift and how hard your gonna wheel.
For sake of time I'd say do the D35 swap, UNLESS you can't find one, then go ahead with the D30 SAS since you already have it.
If you could find a D35 setup hub to hub with the steering linkage, that would be the most ideal setup (I'd try and regear it before doing the swap, as the third member is a pain to remove afterwards).
I'd probably suggest 4" Skyjacker coils, Skyjacker drop brackets, a Lock-Rite or Aussie locker up front, 5-760x u-joints, HD Jeep D35 hubs, and an extreme drop pitman arm or modified superlift superrunner steering setup (find a used one).