My 67 400 has an aluminium radiator with two puller fans, switched by a thermo switch in an Edelbrock Performer RPM manifold.
Trouble is the fans switch on when the temp guage is reading around 120 deg F and usually don't switch off until just above 100F, about 20 minutes after the engine is turned off.
(Yes the fans have discharged the battery and I now have a switch in line to manually turn them off.)
When the car is travelling at around 50mph the temp gauge is sitting just below the centre (~175F), so it looks like the gauge is reasonably accurate.
I suspect the thermo switch is faulty, but what to replace it with? It looks like 185F and 195F switch-on is the norm for the thermo switches.
