'71 Dart 6.4L swap progress being made!
WORD OF CAUTION - If you are using the Classic Auto Air (or any system that uses an electronic blocking valve to the heater core rather than a blend door) - You will need to install additional T's on the coolant line to the heater core path for a return to the engine when the heater is off, otherwise you will only have coolant flowing on one side of the engine. Another shop buddy was working on an E body and wondering why only one side of the engine was heating up. The coolant had no return unless the heater was switched on.
That could have been bad. At least the lesson was learned without destruction (and not on my car / engine.)