You have to buy the gear shaft casing from a manual and simply remove the ignition barrel from automatic box casing and plug it into the manual box casing. And take care of the wiring near the battery - there you have to connect two pairs of wires, one pair takes care of the ignition and the second of the cruise control sensor. Additionally near the baterry connect also the wire to the reverse sensor, which will be on the manual transmision. Go throught WIS wiring diagram, and you will know what to do. One tricky thing, when looking at the diagram, you may thing, that you will need to run a wire from the engine bay to the clutch sensor (for cruise control). You are wrong, you simply in the engine bay connects the wires together and you connect the clutch sensor in series with the brake sensor. Just make sure to connect it in series with the right brake sensor, as there are two - check the color wiring in WIS.
To add the clutch pedal, you will need to take out the whole dashboard, there is no shortway here. Everything is in WIS good documented. It is not easy to the out the automatic brake pedal, but the only difference in them is the size of the part which you press by leg. You can simply cut it in car to the size of the brake pedal in manual cars.
You can live in car the whole automatic wiring, there is no sense and no easy way to get it out. Just unplug the automatic control module.
I'm at the point of 'starting' the swapped over engine and transmission from this above mentioned process (brought the forged engine and many do-dads over to an auto shell) and I'm having a hard time trying to 'jump' the NSS; I have the ecu and key from the original car, and I'm not getting 'key error' on the SID, so I have a hunch that the lack of crank (at all) is due to the missing NSS.
Does anyone have a WIS on hand and / or know these wires to be jumped off hand? I am acquiring a copy now, but was just hoping someone had the pinout's off the NSS connector of which wires to jump to get the starter selenoid to do it's thing; The reverse light pinout would be a sweet bonus!