If you decide to take Bill's suggestion about a cable controlled valve from NAPA, you will discard the orig valve, attach one heater hose to the tube sticking out of firewall from core and run a hose thru firewall to other tube on core. You will install NAPA valve on that hose to control water flow. I believe that one is the incoming.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
| 
