Hello
I have a 79 Zephyr with no AC.
The heater core has 2 tubes sticking out of the firewall.
My question is-
Which tube is the inlet, and which tube is the outlet?
Does 1 of the tubes go to the right, or the left? (Looking at the firewall)
Could I flip the heater core over to swap the tubes’ location if necessary?
Thanks!
Trying to route my coolant lines
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