64 barracuda runs hot

The stock gage is a guesstimate one ... put an aftermarket gage on it and it'll read the exact temp . If you do not have a space for a aftermarket one on the intake I have seen electric ones that screw to the factory sending unit and even comes with one in the package . I bought mine from O'reilly's @ $30. I have a 160 thermostate and it goes from 160 - 170 and back down again even when I had no fan , fan shroud and straight water .