Does anyone know of an engine cooling fan switch that screws into the intake manifold that passes voltage when closed. (not the grounding type) I would like one that closes at 195-200 degrees and opens at 185-190 degrees so i can run a 180 degree thermostat. I plan on using this switch to pick up a relay to control the engine cooling fan.

See the electric cooling fan section of the Summit catalog - "Jet" makes several of these that turn on and off at different temperatures - used one on my tube-frame Grand Sport. E-mail me if you don't have the catalog and I'll give you the info.

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JohnZ
'69 Z28 Fathom Green