Blackbuick is right.
Specifically, all tank and lines would need to be stainless. Injectors would need to be stainless, and nearly twice their current size because alcohol has about 1/2 the energy content of gasoline. As BB says, you would need a chip designed for alcohol that jacked up the fuel flow. Overall though, you can run higher timing with alcohol.
It wouldn't be *hard*, just *expensive*!