It seems to me that there might be a way to install a heater shut off valve on the coolant hose that feeds through the throttle body. I have used such a valve on a previous 1982 Corvette to shut the hot water off from the dash area in order to improve cooler temps during the summer months. Would it be feasible to install such a shut off on the longer hose in front of the throttle body. The draw back seems to be that you would have to open the valve during the winter months to get hot water into the heater core in order to run your heater. I have a 1996 and have already bypassed the throttle body. But I understand that the purpose for the flow of hot water through the throttle body is to prevent it from icing or freezing in bitter cold temperatures. Any ideas or reponses?