Running Hot on the Highway

A lot of good suggestions above, thanks for all who contributed. I am going to try a new 180 thermostat next because it appears the Mr Gasket 160 High Flow is not letting the coolant circulate correctly. We have rain for the next few days so it will probably be a while before I get the car back out.

The lower hose on the water pump is on the driver's side. All '69 and earlier small blocks had that configuration. In '70 they switched to the pass side.