Egg, this plane had it's radiator removed (underbelly) to give it less drag. It used some kind of a boil off system if I remember. Photo's of it in it's last race show structural problems. You could see oil canning in the fuselage and the canopy wasn't fitting right. It's wings wee shortened by I believe 14 feet as was the tail. It was the most highly modified Mustang in the world and the fastest. But they had some problems that all came together in that last race. These planes at this speed and altitude are completely unforgiving.