In my Toranas I used a Toyota Hilux LN106 series evaporator and integrated it under the dash (Hidden) which blows into the original Holden air box. All the flaps, air direction, and heater operate from the original controls. The system works better than any Holden A/C I have ever had. On a 42 deg day I can get the temp down to 23 on medium fan speed. Not as big an area to cool as the panno but I reckon would do the job well. The Toyota Hilux evaporator unit contains the high and low pressure switches, TX valve and the amplifier so wiring it up is very simple. I also used the Hilux compressor and condenser unit.