You can't. You'll need to add a return line that goes back to the gas tank. And change the gas tank sending unit to one that has a place to attach the return line. (I looked at all that and decided it wasn't worth the effort. Replaced tank and sending unit, with an electric in-tank pump from Tanks, Inc. Then installed a bypass regulator at the carb, so it always gets cool fuel. Sends whatever it doesn't use back to the tank. A little more work, a lot more money, but it's bulletproof.)
