Im using the stock mustang fuel tank. I am running a coyote so I have fuel injection with a pump inside the tank. I have fuel starvation problems below 1/4 tank driving on country roads. I went to the track recently below 1/2 tank was a big problem in right hand corners. I mostly street drive the car. does anyone have any suggestions? Im thinking remove the tank and modify it to install a surge. like a radium or something similar.