This is very helpful Jeff, thanks! The one thing I don't see in those pictures is the routing for the heater hose to the carbeurator choke. It looks like that particular heater hose, on some of the images you attached, is laying down below the valve cover, next to the exhaust manifold rather than right next to the choke. Also - just to be clear - the heater hose that connects to the steel tube and the heater valve is coneected to the heater core tube that is closest to the driver's side, correct?
I really appreciate your help