I drive and fart around town in stoplight traffic. Was 100 degrees out here on and off last few weeks. It's the car I get groceries in.
No overheating here. I have a 4 row Champion, Milodon water pump, Milodon thermostat (to Milodon spec only from US plant)
On the highway with steady airflow no issues at all. About 170 to 180 degrees cruising at 70-80 mph at 3500-3800 rpm. Even in 100 degree heat outside.