I have a 72 454 in my nova . On the intake there is two 3/4" hoses. The front hose is very short and goes to the water pump . The other I believe , ran to the heater core , which isn't being used. The hose is now looped to the left side of the water pump. My question is would it be o.k. to plug off looped hose ? It would be like the heater core valve was shut anyway,right?