I have an 81 bronco. Im wanting to know what all a/c related parts i can remove from the firewall and still have a working defroster. I havent had a working a/c in 15 years. I removed the compressor 10 years ago and bypassed the heater core when it began to leak. I have no intentions of ever fixing the a/c. I dont even need a heater just a defroster for keeping my windshield free of fog.