Good day, Gentleman. I am using a coyote and installing the Vintage heater defroster and have a question on circulation and control. The Ford Performance guys say the circulation should be constant through the core and sent me a diagram of the overall circulation of the coolant. Using the ball valve supplied shuts off the constant flow and I am not keen on having the flow throught the core all the time (i.e. when it is 90 degrees out.) Has anyone succesfully used /rigged up the supplied valve or come up with another solution to allow constant flow through the engine as needed but turn on and off flow to the heater core? I have heard rumblings a bout a "4-way valve" but the Ford Perf. guy was unaware of anything in that regard. Thanks!