So the 3SGTE was removed and you now have a 3SGE naturally aspirated engine? Or do you have a 3SGTE with the turbo removed?
If its the first case it will also be worth checking to see what transmision you now have, as they could have retained the e153 turbo transmission or changed it for the s54 non turbo transmission.
Most people when changing from non-turbo to turbo will buy a half cut as that will have everything you need like the wiring, computer, axles, transmission etc. If you do the work yourself then that will be you big cost as well as your time. It also depends on how much turbo stuff was left on the car in the course of converting it to non-turbo.
What are your goals? If your looking to do a build that goes beyond stock I'm selling a setup in Brisbane that you could use, you'd just need a suitable transmision, electricals and ancillaries. Check it out here:
http://www.mr2australia.com/mr2play/tm.aspx?m=128844