If you do some internet research you can carry and external transfer tank that is 50 state legal, some make custom tanks, some prebuilt. There are specific installation instructions, they have to have a pump and cannot gravity feed and are properly vented. They are specific for gasoline.
Stopped at my local ford dealer to check on the cost of the download for the power tune. Service quoted me a price of $800. for the download only, don't think this dealership wants my business. Anyone out there know what the cost should be.