I would upgrade the fuel pump, injectors should be fine till around 400RWHP on E85. You can tune more agressive on E85, thus gaining you more power. On the other hand my tuner was saying that E85 uses more volume than gas, which is why you would have to upgrade the fuel pump, injectors, etc sooner (so you MIGHT see your MPG go down, then again it may not, hell there is a chance it may go up too). Though E85 is cheaper, so in the end it works out and you'll be able to gain some power over gas.
