Nice numbers Gabe! Torque monster.
My guess is another 30whp if you can hit e60 with the injectors, same boost level. However not sure if it will hit e60 with just the injectors, they'll be depleting the rails faster and highside pump will need strong pressure behind it to keep up. IF you could up the boost and hit e60 maybe another 75whp total. That would probably be Port injection with a lowside. But it'll get you as much boost as the blower can handle and full ethanol. $2500 for new injectors, vs $3200 for lowside and port(depending on lowside selection). Port will also be more involved labor and tune wise.
Another 100whp? bigger blower
