1973 Dodge Dart Sport No Heat.

MoparMike1974 said

Upon a second look I see that there is in fact a manual valve in there. Looks like someone bypassed the original setup.

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Yes, they bypassed the original valve and added a manual in line valve. Both hoses go to the firewall and I assume to the heater core but haven't gotten that far yet. I need to get a chassis manual for the car.