Just when I decide not to touch the AC evap core, someone else suggests replacing or cleaning. Now I feel guilty for leaving it alone. I am adding some sound deadening material where the old stuff was crumbling out and probably elsewhere as well. I checked all of the vacuum pods with vacuum (me sucking on a hose to be precise), and they all hold as long as I don't let go. Should I replace them anyway? Maybe I shouldn't ask. Thanks for the suggestions, I promise to seriously reconsider the evaporator.

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1979 240D with 4 spd. (project)
1980 240D with 4 spd. (parts)