How do you get at the heater fan switch on a 1972 El Camino?

I just replaced the blower motor fan switch on my 70 El Camino. I believe it would be the same procedure for a 72.

Remove the dash cover ( 7 screws including two inside the glove box). The dash cover has clips near the windshield. Once the screws are removed, slide the dash cover away from the windshield and over the steering wheel. If you have a column shifter, make sure it is pulled down below the steering wheel. The fan switch is now accessible although a little tight if you have large hands.

There are 2 quarter inch screws holding the switch in place. Loosen the screws with a wrench. Sit in the middle of the car and reach down with your left hand to remove the screws the rest of the way. Make sure you don't drop the screws! Take your time! Pull the switch out of the slot and up to access and remove the connectors. Installation of the new switch is the reverse of removal.

You must have patience! It took me a couple of hours and it went smoothly. The difficulty is starting the screws to secure the new switch. Although you can see where they go with a mirror, you will have to do it by feel. Once you get the screws started, your home free!