Thermostats - high flow vs standard flow - now I am confused

In the process of completing a 408 stroker. I am going with FlowKooler 1700 high flow water pump. I will also be using an after market radiator

I've read that a high flow water pump requires a high flow thermostat and I've read that it needs a standard flow to slow down the flow of water. Which sort of doesn't make sense

It is my understanding the difference between the t-stats is amount of water let in when open, which a high flow water pump can maximize the circulation of the water. So if the radiator is working properly cooling the engine.

Am I missing anything?