I did the opposite of what your doing. All you should need to make it work would be the:
Transmission
Computer-
Pedals(steering column has to come down) unless you just take the clutch pedal out
Torque Converter, nuts for the TC
Flexplate with I believe the 164 tooth plate.
You will also need the cable for the kick down and the shifter box. In place of that you can use a B&M shifter is what I hear. My cross-member from the automatic worked fine on my 5-speed. I'm sure that others have something to add, but I think that about covers it. you can find all of that stuff off a junk car granted its whole.
I had to make up something for the reverse lights because the automatic system on mine had the reverse lights and Park/Neutral switch together.