Thermostat Housing

Wow, leak after leak tells me the housing isn't flat or the sealing surface on the intake isn't either. You can run the t stat housing over a belt sander to true it up. The intake not so much. That would have to be machined. I 100% agree with @Oldmanmopar. Turn the housing over, put the t stat in the pocket and glue the gasket on the housing. I don't usually use sealer on the gasket to intake surface and don't have a leak issue (as long as the surfaces are flat)