Started a winter project.... Heater/AC Box

So, I tore my dash apart. Replacing instrument cluster, heater core, dash pad, new bushings in wipers, and the such.
Anyways....
I would like to post a little about the box. Might help somebody that's never been here before know/understand. I might post a video explaining some about this.... (keep in mind, I'm a hobbyist, not a professional) :)

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