I cannot say I know too much about the differences of EL Climate Control System and the Standard one.
However, I have an EB Fairmont with Climate Control and the main differences I've found between that and a non Climate system are the following;
- the tempreture sensor on the dash
- more actuators (attached to the heaterbox) for the elctronic actuation of recirc, changing vent's etc
- More Vacum tubes
- Fan Speed Controller, my fan has about 10 settings (standard falcon's only have 4?)
- Wiring looms
- Obviously the actual Climate Control Box (the thing in the dash)
Having removed mine to replace the evaporator, I would say it would be a difficult task. But I'm no expert.