Heater line part identification help

Hey folks,
Just curious what this might be. Just got the duster up and running but no heat. I have other things to check, but noticed that when I tested this with the vacuum pump, it tended to not work or stick open. Car is factory AC.
Where do I get one, and or do i want to replace it or remove it and just run a hose.
Thanks in Advance,
Adam
View attachment 1715258315

Hello bisblue,
Pix one and two are for reference that I found on e bay.
Pix 3 and 4 is my duster
"OEM Mopar Heater Control Valve For Various 71-83 Dodge Chrysler Plymouth 384638"
Hope this helps.
Happy Mopar :)
Arron
Heat control valve 3.jpg
Heat control valve 5.jpg
Heat control valve A.jpg
Heat control valve B.jpg