The Stovebolt Site Forums The Shop Area Engine Shop Why dual carburetors?

i have dual carbs on my 235 with fentons and 2.73 rear end and i am getting 12.5 mpg. a while back one carb became inoperative and the mileage jumped to 19mph. but i can't be sure of this. i do have plenty of power even with the 2.73 rearend. ron