There is absolutely no way I'd do this.
What are you gaining? You're going backwards in technology!!
Resale of the car will be shot cause no one wants that anymore, emissions are out of the question for anyone that needs this to get tags, driveability and the amount of electronics and parts that need removed are just rediculous. Spend the $ elsewhere.
Yes, a properly setup carb will make just as much HP as a EFI setup. But why go through all that work and brain damage, for no gain or betterment of your ride?
Are you having EFI issues? What do you think will be better with a carb?