[pjmoreland]

I installed Vortec heads, which are lacking a coolant hole that older heads have for recirculation before the thermostat opens. I am relying on my heater core for recirculation, so installing a manual shutoff valve to the heater core would be a bad move in my case. I would have to install a thermostat bypass hose between the water pump and front of the intake manifold. I really don't like how those bypass hoses look. I will have to do that eventually though if I add AC to my truck.