I was so tempted to put my electric water pump back on.. it seemed to move quite a bit of water.. but the majority of the driving it sees in the summer is on the street. I've been aiming towards being able to take it on longer trips and I just felt a mechanical pump would be more dependable in the long run... I personally run distilled water with a bottle of redline water wetter, a gutted thermostat, and no bypass... It's a remanufactured water pump, but it has a pentagon on it and has serial numbers for some fancy 340 car...
I took the heater core and heater box out years ago and never look back. I don't drive it except for on nice days...