Its pretty easy, just takes some snap wring pliers, wrenches for case bolts, and some rtv silicone to put it back together. Just take it apart slowly, the 27 and 32 spline shafts swap out with each other with no mods, so if you take your time, its basically like taking it apart and immediately putting it back together. You could possibly take some pictures also along the way to help out. EDIT, sorry dont have a writeup, did it a few years ago, it only took me about an hour though so it shouldnt be too hard.
Regards,
Remington