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So I recently went to a junk yard and I saw a Comanche, so I started to dig for parts and I got some stuff that I have no clue what I got but it looked like it may come in handy in the long run, any clue on what I have, everything came out of a 91 comanche, thank y’all !

I made a post about my vacuum leak awhile back and you guys helped me figure out what's actually going on. Now I'm actually trying to fix it lol. So I have an 89 with the 4L/4WD and without going into tons of backstory, I pulled my dash to fix a water leak like 2 years ago. Sometime after that, I noticed that when I have my AC/Heat/Vent/Anything on and I'm climbing up a hill, the AC switches to defrost until I release the gas. Then, it goes back to whichever mode the controls are set to. It will do this occasionally on level ground but it's much more pronounced in 3rd/4th up a hill. I inspected the Vacuum reservoir in the front bumper and it appears fine. I looked over the lines in the engine compartment, can't see anything there either. I thought maybe it was the stupid vacuum disconnect for the axel since it's so loosy-goosy but disconnecting that and plugging the lines made no difference. I removed the stereo and lower dash to inspect everything I can see hoping I won't have to take the rest of the dash off but I'm not seeing anything clearly broken or loose except some cracks on the AC Control unit itself: There is another screw on the right side of the unit that has a similar crack as well and just flexing the unit will spread the crack apart. But I don't know how vacuum is routed through there and if it's possible that this could be the source of a leak. I have a Chrysler Service Manual for the 1990 Jeeps. I don't think there's much change between 89 and 90's as far as this is concerned? But I went through all the modes on my truck and they matched up with this (except my control unit doesn't have "Max AC"): So that at least gives me some sense that I reconnected the lines correctly when I reinstalled the dash. It's entirely possible that there are cracks on the lines I missed - They are all original with 267k miles on them so I'm sure they could all be replaced. I'm trying to follow lines back and inspect logically but as you guys know, they're not all super easy to get to. Jess