Weird sounds and bogging

So recently I was having an overheating problem in my car. I went through and changed the hoses, radiator, and water pump and timing belt. After changing all that it started up like normal everything was good everything worked. Overheating didn't stop. So I went to the head gasket. I pulled the head off cleaned the head and block, put the new gasket in and tightened everything thing down to spec. Now the car runs really badly and now my temperature gauge, fuel gauge, brake light, oil light, and engine light, and turn signals do not work. Like I unplugged my o2 sensor to make the check engine come on and it didn't. Help