if all the hicas has been removed chances are some one took out the hicas ecu(mounted under the rear parcel shelf) if its disconected the front sterrimg will go heavy because the valve on the front steering rack will close get a pump+bracket and lines from r33 and rack from a 180 and the job will be 110% only way it to get rid of every part of that hicas crap!!
Thats a good one gem. Didnt know that. Surely if you've all the wires and everything off the rack it wont be restricting it?