Robert,

Something came to mind regarding your temperature problem that I don't
think anyone's mentioned....  the voltage regulator for the gauges.
There is a small, square IC on the back of the instrument cluster which
is supposed to take 12V to 10V for the dash instruments.  I had two of
these things fail in my 1983, one time both the fuel gauge and
temperature gauge read high, the other failure the received 0 voltage
and didn't read at all.  I suggest checking the voltage as the gauges,
and verify that you're seeing 10V and not 12V before you get on an
adventure with the cooling system.
--

<>Best Regards,
Jon B Kanas

Longmont, Colorado; Cultural Center of the Universe
Email: kanas@qadas.com <mailto:kanas@qadas.com>
Website: http://www.qadas.com/~kanas <http://www.qadas.com/%7Ekanas>
AOL Instant Messenger ID: KanasColo