Thermostat failure Mr. Gasket High Flow

Well today I went to a few Auto stores and all they had was the Mr. Gasket one that failed twice for me. I went to the S&K speed shop and saw an Edelbrock that I bought. I put it in a can of water with a Temp. gauge and opened at the rated 180*. I did it several times and it opened and closed they way the Chinese crap didn't. Tomorrow's job in the 30* weather is to install new thermostat. I'll put garage heater on about an hour before I start working on it. Biggest pain is draining Anti freeze.