Does it matter what way I hook up the heater core? I cant remember which hooks to which. See photo

 

there two different size you no?

 

Yeah coming out of the heater core but not on the switch thing next to it. That is why I wanted to know if it mattered

 

Lots of folks have eliminated the heater control valve and run 3/4" hose from the stat cover to the core, then run 5/8" hose from the core to the pump. Chrysler/Jeep eliminated it on '97 up XJs. If u eliminate it, don't forget to cap the vacuum hose.

 

look inside...