What type of gasket is used in the gas sending unit. I cant tell in the photos if its an -O- ring or a flat round gasket. I noticed yesterday there was a small amount of gas under the back of the Maverick, I was hoping it was just a loose line, it wasn't. Its leaking around the sending unit. i wiggled it around a little now its leaking a lot. I'm supposes to meet up with some high school buds tonight to show the car off. My old maverick was a big part of our high school years. I was hoping i could just pull the sending unit and put a new -O- ring behind it and be good to go.