I have a 1950 Merc with a 302 in it. When I got it, it had no heater in it. I've redone factory heater parts and installed them, but I want to get some help with making sure the hoses are run correctly. From the water port on the intake manifold, where do I run my hose to first, the heater core or the heater valve? What's the correct routing for all the connections?