would use the TSV and manual a/c systems the TCA as an additional system to control evaporator temperature. I though (till now) the only difference between manual and auto systems was the myriad of doors, door motors, inside, outside and duct sensors and an additional computer to control them.
You mentioned wanting to add a TCA to your system in order to prevent evap freeze-up but do you have the right ECU to receive the signal?