With the Weiand water pump, you may run any thermostat your heart desires, with no mods required. Of course, you'll probably find, as I did, that the rating of the thermostat means Zilch as far as what temperature your motor maintains. Going to 'vegas this year, I ran a 193 thermostat & the car ran at 190. In 'Vegas, I changed to a 160 thermostat. The car ran all the way home at 190....
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