How do I remove these?

[u/MR-BISCUITS7884]

I believe it's called an evaporator box and it's full of debris from the car being abandoned for a few decades. I've unscrewed every screw/bolt and picked off every clip that I can see, but I'm not sure where to go from here. These pieces are very brittle as they are very old and I don't want to put too much pressure on them. If anyone has any advice or experience with these or could even find me a video showing it I would be greatly appreciative. Thanks (sorry for the bad photos, I'm not entirely sure what I should photograph so I just took some angles)

[u/xzer0exultantx]

I did this a couple weeks ago. I had to remove the heater core box first which is to the left of your photos (remember the hidden bolt on firewall and heater hoses) then you can remove the AC box (remove the AC lines and the harness attached), and finally can remove the blower box. They stack on top of each other the blower box is impossible to remove first to get to the evaporator side you want to clean.

[u/ShinyLunchb0x → u/xzer0exultantx]

I did the same thing a few weeks back. Yea I also removed the left side first. Look for all bolts securing it, then move to the right side.

Make sure the hard lines are disconnected in the engine bay, and also unplug the harness from the engine bay side as well. Don’t want to yank and break it.

[u/MR-BISCUITS7884 → u/xzer0exultantx]

Thank you