Looking at changing my thermostat to a 160'. The one I took out looks to be made by Flowkooler Robertshaw? It is stamped 160' but the car runs way too hot at 200'. (i'm running twin electric fans). It has a 2.250' dia. flange. .035" thk. My intake is a Mopar M-1 single plane. Any ideas? Or, should I drill some holes in the one I took out for by pass?
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