AC removal to just heat

Well how do you take the whole assembly how of the inside of the car? I need to deep clean the inside of the ac and heater box. And when i bought the car all of the ac stuff in the engine bay wasn’t gone. And there’s no vacuum hoses that go from the engine the the ac/heater to move any of the doors.
Not that much. Look at the firewall. Some studs coming through. I forget how many, but ?? maybe 5? The TRICK is the bolt over in the pass side vent door. There's a "J" bolt that goes up through vertically and hoods up over the lip up inside the cowl. Open the door, flashlight, and feel around. You'd be time / money ahead to yank the seat.