[bobcowan]

You may not have to swap the carb. The only issue is that supposedly some of the standard Holley components can't handle the E85. gaskets and seals. You might be able to rebuild your current carb with the new seals.

Same thing with the hoses. Some rubber hoses are supposedly not compatible.

However, E85 is not nearly as caustic as some people say it is. Lots of folks are using it with standard hoses and components without any difficulties.

The big issue is fuel volume - not pressure. You'll need about 20-25% more fuel volume than gasoline. You should first make sure your fuel pump and lines can manage that. All the way from the fuel tank pick up to the carb. 3/8" lines probably won't cut it.