Ok, I bought this car for my son and it was running hot after finding it had a bad radiator cap. So we decided to swap it out. Now me, i am a mopar guy, but I have a love for mustangs; I owned a few. But i am not a ford motor guy. I can take apart mostly anything and fix it but this is driving me crazy. I loosened 2 bolt on the thermostat housing and the third one broke. I removed the housing and the thermostat was origanally all brass. Now i try vice grips with plenty of blaster: no luck. We let it sit a few days and continue juicing. Tried a small pipe wrench: no luck. now i just got done putting heat to it and its not moving. Has any one had this problem? I am open to all suggestions but I am thinking that i will be tearing the whole front of that motor down to extract it.