Hey, believe it or not, was just thinking about you today, wondering how things were going, and whether or not the 164 was functioning ok. Was going to ask about you on the BB.
First of all, the lousy window and seat switches will do that after a few years. Most of us have figured out that you can pull the switches out, pull them partially apart, cut the little cellophane window out, and spray the inside with something like electronic cleaner or WD40 (what I used) and the switches should work again. Seems the little plastic window traps a film of contaminants (from maybe the contacts sparking?) on the contacts and they stop conducting after a while. Removing that film and spraying/cleaning the contacts should fix that problem. Do not replace the window. Did this years ago in my 91S and they still work ok. So far, the ones in the LS don't seem to need this fix, but one never knows, lol.
For the a/c, do a Google search for the info provided by "roadtrip" and others concerning a/c work on these cars. Use different titles in the search to finally find some info. Should also be in Steve's maintenance postings at the head of the 164 section in the BB. When I changed my 91S over to 134a, I changed the condenser over to a newer more efficient one (simple change), and had the dryer and several fittings and expansion valve replaced, oil changed in the compressor. Don't remember what all now, since I had a shop do the basic change for the 134a, not complicated, and then I replaced the condenser myself later, just refilling the system, using new appropriate washers at the condenser joints and cans of 134a (using the simple screw on trigger handle with gauge and hose) available at any autoparts store.
Maybe start here? (http://www.alfabb.com/bb/forums/164-...etrofit-4.html
and here? (http://www.alfabb.com/bb/forums/164-...ion-guide.html
This appears to be roadtrip's actual (and excellent) manual he wrote up for this change:
These should get you started.
Hope all is well with you all otherwise?