Slant Temperature

It always ran at about 180 on a hot day in the 90s. I never had the factory gauge go halfway. There’s a plug on the passenger side of the block that I removed and that’s where the aftermarket temp sensor is plugged into. Both gauges have never showed hot once. I checked coolant and it’s full in both reservoir and the radiator. I check fluid every other week I drive it and none is missing. No air. I’ll switch the gauge and then see, if still happening then I’ll switch sending units. All gauges read correctly as well and no radiator shroud. I’ll return with results from switching things out.

Reason for the high flow pump in my opinion is the water will sit in the block and radiator longer with a factory pump. Increasing the flow will move the fluid faster and also I want to daily drive the car. The engine came out of my 65 and it never overheated, never once got hot. Engine has about 30k on it. Just was wondering if there was an aftermarket high flow pump that was recommended for slants. I know it won’t fix the overheating issue alone. A new aluminum radiator is in the future with electric fans, just want to make one purchase and be done with it.