I dont know much about alcohol ops but i do know the stoicametric ratio in a piston alcohol fuel engine you are looking at a ratio of 6 - 1 which is about double the consumption of avaition gasolene at 12 - 1 cruise (as equinox points out).
Good luck. I hope you have large tanks with fuel to burn...
With the issues around fuel icing that others have pointed out
Good Luck
