On my small block stroker Dart, I had a Real Gasket silicone gasket at the thermostat housing, never had a problem with it, until I installed the Flowkooler pump. It blew the gasket out two times in a row. Then went to an o-ringed thermostat housing, problem solved. Just saying that I think that the Flowkooler pump may move more water. It's what I will use from here on out.