i have a 81 elky..the blower motor harness has been cut off,,i picked up one from a donor elky.,my ?? is where do the vacuum lines go?? i dont have a heater control valve in the heater hose either,,so how do i plum this so the heat will switch from floor to defrost,,in the summer ill just remove the hoses and block the ports,,it has no a/c either,,,thanks in advance,,