electric water pump for my eg33

[subarvair]

I know there is a huge thread on overheating which I read a lot when building my eg33 for a mid engine project. The changes I made were to move the thermostat from the inlet to the return side of the engine water system and increased the inlet fitting to 1.75" and am running 1.75 inlet hose to the radiator which is in the front of the car(about an 8' run). The return to the radiator is all 1.5".
With 180* thermostat, the engine runs for about 4 min and then overheats with an airlock in the engine. I have bled the system several different ways with the same result. I even hooked up the garden hose and forced water to the pump. I have pressure tested the system-there are no leaks.
Seems to me the waterpump can not suck water in the volume it needs because of the distance to the radiator and that what is needed is an electric pump at the radiator to push the inlet water to the engine water pump. I guess the flow would need to be at least 30 g/min.
Has anyone done this and did it solve any problems? What capacity pump was used?
Do you guys think this would solve the problem.
Mike