I deleted my A/C on my 70 & bought a A/C delete panel from Ground Up, so I could still use my heater (live in Ohio). It is black plastic & looks factory. You just add your blower to the panel. I put the unused A/C wiring under dash & made a metal plug for big hole in firewall. I used one blue wire out of that harness & it plugs into the blower relay, along with the blower wire & ground wire. I still hooked up vaccum hoses to dash control panel. Their is only one cable from the dash control, operates the hot/cold spilter door. If your windshield fogs up you can take care of it. I like to cruise to the early Spring & late Autumn cruise-ins, a block off plate limits your street driving in the North Mid-West and is for a race car only.