http://www.eere.energy.gov/afdc/e85toolkit/

it should've been done 30 years ago. realistically for our old 8:1 carbed gas burners the best thing would be to just mix a little of it with gas. to run it exclusively would require 12:1's and an alcohol friendly fuel system whether it be carbed or injected. alcohol brings corrosion issues with it, requires special rubber/seals, and about a 2.4 X increase in fuel delivery compared to gasoline.