I replaced all my rubber lines with the e85 barricade hose mainly to keep me busy during the winter season...new oem fuel line is fine on e85, just more expensive. The only thing I would say you have to change is injectors if you're on oem early styles..
I only did my Walbro 485 pump and Injectors for the extra fuel demand. All this fuel filter/stock rail "corrosion" has been proven to be a myth by many people.