For years Dallas Mustang sold a NOS version of that hose marked C6_________ it had bends on both ends like this one:
That's exactly the one I have, not the NOS one though.
As NOS does that mean it was the service replacement part that differed from the one used in the factory or was it exactly the same as the one when the car was built? From my 2 images from different parts of the assembly manual it seems there was some issue with either the hose or the routing of the heater hoses.
So the $64K question is which is it?