Coolant flow

All this talk about thermostats has brought a question to my mind….

In the 6pak tuning guide they state that in order to get the exact correct tuning on your setup, certain items and parameters MUST be met. One item they state that must be in place is the 195 thermostat, which came stock on 6bbl cars. Seems awful high to me, but my car runs very good with its stock components, and it does have the original 195 thermostat in place. Any opinions on why the need for such a high temp thermostat?