1985 Mustang AOD 5.0

Im gonna be taking out my AC soon. The hoses havent been hooked up in idk how long. I dont even care, If i can save weight in the front end, Ill take it.

I understand how to take out the compresser already. Theres a kit for it that relocates the power steering up to where the AC Compressor goes bc of the tensioner, I understand all that no problem.

I have my dash out right now. I had fuse problems and my headlight clip burnt up, whatever, thats being fixed. But while I have my dash out and my AC is getting junked, is there anything I can do with all that crap behind my dash? All those boxes and stuff... Im not exactly sure what they are. Heater Core and some other stuff. I dont care about my heat or anything. It just needs to drive.

First off, what is what? Then, what can I take out and what can I leave in? Is it worth it and will it save me weight? What do I do with the vaccum lines? Should I say screw it and take it all out? Do I need hoses for some of those lines?

Im a newb with cars I need some help with all of this