well, found the AC LEAK. the Evaporator DOES have a pinhole right dead Center ! Really don't want to risk repairing it, who's to say it won't spring a leak right next to it next week. Has anyone ever checked to see if a Chevette evaporator is the same ? (or anything else ?)

Lou, it doesn't look like any other cars will work.

Source:

http://www.fierosails.com/EvaporatorCore.html