flex fuel?

Plenty of people have converted carb engines to run on E85. I'm sure a Google search would turn up a ton of results. Someone (Quickfuel maybe) even makes a conversion carb for E85. Or you can convert your own carb. I'm not sure on the details, but I know it takes bigger jets and everything in your fuel system has to be made of something that won't be eaten away by the alcohol. The disadvantage of the conversion is it will take more fuel to run your car (lower mpg's). The advantage is that E85 is rated at somewhere around 105 octane.

Make sure you do an into in the Welcome Wagon section.