Moroso water pump drive kits

Just wondering are people running these using a flow restricter or none at all. I modified a thermostat as a restricter seems to be to much restriction.

I run one on my 96 Dakota race truck. I used a gutted thermostat. I don't seem to be having any problems with it keeping my engine cool. but my engine is nothing radical. I wanted to go with a full electric water pump, but i don't have enough room between the water pump and my radiator.