If you look on Rock Auto they show the power steering pump without the reservoir with no mention whether the application is vacuum or hydro brake system. Master cylinder should be the same but you have to be careful that the rod that pushes the master cylinder from the brake peddle is the...
I did this swap 10 years ago and I can add that I had to trim the inner door shell a bit to make the interior panels fit. You will never see it with the door panels installed.
I have always run a 700R4 so I didn't have to deal with electronics with the tranny. The original motor and tranny came out of a 89 k1500. I wish I would have swapped an in a L480 awhile ago, I've replaced the tranny twice in the last 3 years always 600 miles from home.
I've gone the opposite way in a couple of trucks, most recently a 97 2dr Tahoe from a 5.7 to 6.2 and I have allway swapped out dash, engine harnesses and instrument clusters. You would need a donnor.