What is the general consensus? Should I use a sealant on the thermostat housing gasket or not? I’ve got a Windsor Ford small block And had to put a spacer in between the intake manifold and the “FE” style expansion tank so there will be two gaskets on either side of a spacer. Would you recommend using permatex on the gaskets and T-Stat housing or just using the fiber based gaskets with no sealant.