The book I am referring to is "Super Tuning and Modifying Holley Carburetors" by Dave Emanuel. It has a section on page 83 that deals with alcohol. Their focus is more for racing, though. They recommend drilling fuel passages out to the maximum size, and other things like that. For the street, below 400hp, it says a single 4barrel should deliver all the fuel you'll need. I said 600cfm because it'd be harder to lean it out with that by flowing more air than the fuel passages could handle. I believe they are talking about pure alcohol in this book, and as such E85 may work better.