You need the right kind of soft lines, and bigger jets, at a minimum.
There are US companies that specialize in converting carb to E85.
http://www.e85carbs.com/
Quick Fuel E85 Carburetors | Quick Fuel
Mark Sullen's E85 Carburetor Conversions
Fuel consumption is higher, but E85 engines make better power and run cooler than gasoline.
Once you convert a carb to E85, you need to convert it back, or replace the carb to burn normal gasoline. Failure to do so will cause your engine to run rich to the point that it could damage the engine.
Lots of paranoia about alcohol blends, but our family has been running blended fuel since 1980 or so in all of our farm fleet vehicles with zero fuel related problems. We even store our own fuel on site, and with a modicum of care, we've had no problems.