To someone on here this will be simple....ihave a 74 non ac heater conrol panel and switch(nos) that i got for $5 at a local pic a part ....out of a trunk of a parts car i was geetting parts from. Anyway, my car(a 74 with ac wiring) needs a new control panel and this fits the bill. Problem i am having is figuring out how to wire the non ac switch to the ac wiring..would love to keep the relay due to the larger ac blower motor. Wondering if i could just replace the resistor to a non ac one and then run new wires to the switch and leave the relay out as well or?????Car has no ac at all not even the ductwork so hopefully you guys can help. Surely i am not the only one to come across this......