If you already have 60# injectors and a tuner your already set for e85 too. Dial in 30% more fuel in your ifr table and fill it up with the corn mash. then you could put whatever pulley you want on there down to probably a 3.4 or 3.3 maybe even less depending on how your setup reacts with the 9:1. On gasoline I would get the timing down around 16-18 and try a 3.6 or so