Hello Everybody, I got a 1985 302 ford engine that has a place on the back side of the engine and on the passenger side that has 1/8 pipe threads. I thought it may be for the oil sending unit or for water temperture sending unit but I don't know. The only way to get to it is to reach in behind the passanger side head and it is right above the flange where the tranmission bolts up to the engine. Can someone shine some light on this as what it for, Can I just plug it off? I am running a carb and not efi. Thanks