On the topic of temp gauges I have never trusted mine either, you just get
a feel for where it likes to be. In my '71, the engine is warm once the
needle is 1/4 the way between C and N and the radiator (50/50
Water/Antifreeze) will boil just before the needle in the gauge reaches N.
I think the best use for the gauge is to pull it and put a voltmeter in.
I haven't done this but I have a voltmeter in my center console and it is
the most usefull gauge I have.
James Nazarian
'71 B
"74 BGT (soon to be V8)
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