What do you think of the feasibility of just running one of those Davie's electric water pump kits? They don't seem super popular for some reason.

I used a Meziere electric pump on my Roadster, and it was fantastic. Through a couple track days, temp never got over 180. Makes burping the system easier (you can hear the pump priming and air bubbles cycling through without having the engine on, generating heat) - assuming there is a small bypass opening in the thermostat (like a 1/8" hole). Since it was all key-on ignition-powered, you could turn off the engine and just leave the key on to cycle coolant and keep the radiator fan going. Made so much more sense for racing.