It looks very clean around the sending unit area, all the way up to the carburetor. Unfortunately I was not able to find any area that appeared to be leaking. The car is pretty rust free except for the trunk area. The rust area is about the size of a medium pizza. I noticed that the gas tank straps are attached to the only area of the car that has the rust. It looks like the passenger side gas tank strap may have failed because of the rust, in turn possibly making a hole in the gas tank.