No worries about heating fuel. Next time you go for ride pop your hood and put your hand on the intake. Even cast iron intakes don't get hot enough to worry about. Aluminum will convey even less heat. I would worry about vibration and eventually rubbing a hole in the tube. I have think salmon's idea would take care of that.
Robert- thanks for the guidance and input. Good point on possibly rubbing a hole in the tube. Didn't even think of that.
