Skip output shaft and LSD, unless you can get a Quaife or Torsen. And you won't like the prices on either of those. You'll need clutches, probably want to freshen up the valve body etc.
Why not the output shaft? I've read of them breaking and I figured since I'm in there. I see a couple other companies offering the LSD, are they mot up to par?
86 Fiero se convertible 3800sc 4t65e HD(2002), Gen V, 3.3 pulley, SD headers