Bad/Weak water pump?????

Treblig said

I guess I could buy a new 160 degree thermostat (I live in a very, very hot and humid climate) and swap it out that way if I still get low flow I can still assume it's the pump and I won't have remove the thermostat housing again (just the pump).

treblig

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The thermostat sets the floor of the cooling system, not the ceiling which is your problem. I would try another, not remove it. There can be more harm than good with no thermostat to balance flow through the block. Check the radiator fins. Clean them out with compressed air. Check the thermostat in a pan of hot water with a thermometer. See where it begins to open. Simple things 1st.