You didn’t say which Evo8, Since you have standard cams, you didn’t need bigger injectors (IMO) you need to decide how hard you want to boost, safe boost of say1.6bar should get you a safe 360 bhp pushing boost further will take you up higher, your Turbo set up will allow 2bar easy but you could be in for an expensive bill, a safe 360bhp car is very quick, safe and reliable. Don’t forget to think about a better oil cooler too.
Good luck