thermostat gasket leaking

I did try all of the above tricks. The Flowkooler pump blew the Real Gasket out 2 times in a row, fun cleaning up the engine bay. The Flashpower #181491-200 o-ringed thermostat housing cured it. Have them on 3 cars now. That number is for the 370 Robert Shaw thermostat. The Real Gasket worked fine until I installed the Flowkooler pump.