I spent the past week restoring the a/c evaporator housing. It even had it's original POA valve, dated September 21, 1971 still attached. Some gentle application of paint stripper and degreaser removed the years of gunk and overspray, leaving a very clean fiberglas housing. Even the original red paint inspection mark and the Harrision decal remained intact. I replaced the factory heater core as I was not about to trust the 33 year-old piece in there. I also replaced the a/c wiring harness as the original was melted beyond recognition and repaired with, of all things, aluminum foil and duct tape. Gee, no electrical shorts there!