I am thinking about putting an electric fan on this car and getting my ducks in a row and plan on hooking up one of those thermostats that come on at a certain degree and go off at a certain degree and looking for a place to put the sending unit. This is the only place I know to do it other than another member said there is a plug in the side of the block. This is a 440. Problem is I tried to remove this plug and it wouldn't come out. I even put the impact on it with an extension and it didn't budge. I tried a breaker bar with an extension and it didn't budge. I don't know what someone did before me or if it is just seized up but I was going to put some heat on it and try it again. I heard that if you heat this water pump housing it will damage some kind of seal in it. Not sure, that is why I am here asking. I do not want to break this housing and have to replace it either. So......with that said, has anyone heated this to remove the plug or will I damage it if I heat it. this is the one by the thermostat. Is the plug in the side of the block another option.