How about 02 sensor fitment? I'm installing some cheap headers now on an engine out of the vehicle, location of the o2 sensor bung looks seriously stupid and seems way too thick. (sensor doesn't look like it will fit "deep" enough in the exhaust) I realize the sensor wiring will need to be extended, I'll just cut up an old one and solder in the wiring. What way is the 02 sensor supposed to face?