Thanks everyone. I think I'll look for the 'toggles' mentioned by 'Steveg'. I haven't used Golden State Pickup Parts for about 10 years, when I was getting parts for a '62 GMC I had a while back. Are they still around? And 'Joker': yeah a sweater every now and then works. But after 14 yrs in Vegas and Arizona (thin blood!) I need a heater in my restored '53 here in Washington! Thanks again everyone!