The second heater box is definitely from a 69-70 300 or New Yorker. Note the center dash duct work is a pure give away. The center dash discharge was continued through 72 w/ slight variations on the ductwork. Reusing your cars specific duct work would allow you to use the basic three pic heater box 69 through 72 as I have done repairs using doner heater boxes parts on 69-72 Chryslers. I'm very sure the same theology can be used on full size Plymouth models 69-72. Have no experience on full size Dodge models to draw from.The second one is a little mystery to me. Perhaps @david hill can identify it. The part number is a little smudged so I'm not sure what it is.
For you guys that don't live where there is real winter, the red thing behind it is my snow blower. LOL
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