have a look over this post
https://celicahobby.com/forums/ubbt...with-aftermarket-headers.html#Post409786And you are looking to go from automatic to manual, so that would include some changes inside your cabin, related to the transmission swaps.
Pay attention to ECU changes and DBW (Drive By Wire) requirements.
If you know what you are doing and are not relaying on everything to be simple bolt-on/swaps, you should be able to make the adjustments you need, with the mechanic/tuner shop tools.