Confused on Heater Control Valve for 1975 Duster 360

I'm in the process of swapping a Eddy RPM Air-Gap onto my wife's Duster (Factory 360 car with A/C and Cruise)

I spent a few hours searching online for proper heater hose routing last night which I finally figured out (I also have both 1975 Factory Service Manuals but they're a little generic and don't have specifics for a Duster 360).

I ended up ordering this one as a backup:
https://www.amazon.com/gp/product/B003R33QZS/?tag=fabo03-20
and one of these:
1975-1976 Chrysler Plymouth ,dodge heater control valve 3846381 | eBay

The one that was on the car is the one I attached a picture of which appears like the one shown in some images of 72-74 cars here.

If I could at least figure out which part number is correct, I'd buy a new/nos one, but I can't seem to identify which one it's supposed to have.

Heater Control Valve removed from car.jpg