Should I or Shouldn't replace t-stat ???

"How do you know the coolant temperature? My 64 & 65 cars just have arbitrary marks on the dash gage, and I recall that in my 69 Dart. Regardless, use another measurement to verify. I use an IR gun which always compares well with the the dash gage in my M-B's (have numerical marks."


I have the factory and aftermarket temp gauge with numbers....