www.explorerforum.com I ended up just using RTV and sealing the thermostat into the housing and then sealing the housing to the block with RTV as well. It leaked when I got it back together and when I took it apart I accidentally tore the gasket. I wont be using gaskets again anytime soon. RTV all the way.
Thermostat change, Ford, Explorer, 5.0, V8, XLT, AWD, 4x4, offroad, no heat