Just get it to turn one last time, then you can take it apart. You need to remove the tumbler, loosen the clamp that holds the lock in place, push the button then pull out the lock. It is a tight squeeze but it can be done. Now disconnect the vacuum lines (label them first) and remove the electronic switch from the rear. Assembly is the reverse of removal. I removed the cover under the dash and the instrument panel, then loosened the screws that hold the dash in place to make it a bit easier.
I designed and built the WVO conversion my self. There is a thread about it on the board somewhere.