You don't need 2 fuel pumps...in fact...all you need is a stock pump and a pump re-wire. Our pumps are fine from the factory. Also, if I were doing E85 I wouldn't skimp and go with 80's. Why? I'd rather have too much fuel than not enough.
My thoughts...screw E85. Get a tuner...put 100% Methanol Injection on it and go to a 3.4"