Beautiful cars guys. really nice.

 

One day I will make it to Z con.

 

ONe day.

To the post #1 point - I think that Nissan had the in-flow hose passing through the water-coks, then the heater core, then out to the pump inlet.  Yours looks like it might be straight to the core then exiting through the coks to the pump inlet.   Have to see what's in the cabin to know for sure.  Maybe yours is that way just for convenience or confusion.  All it's done though is reverse the flow path through the cabin heating system.

 

The whole system gets pressurized so it doesn't matter much.  Probably bothers the engineers out there though.