You should twin turbo it, 2 turbos ,2intercoolers- you can get from junk yard, maybe from eclipes or talon,isusu many choices, 2 air filters and lots of piping, tap into your existing exhaust and of course ecu. Run low boost like 6-8 psi and probably at around 350hp .
Any more boost you better look into injectors and fuel pump and internal mods.
Built correctly this engine can handle well over 1000 hp levels.
Or single turbo,1 large front mount intercooler,1 air filter, cross over exhaust to create single setup tap it into dual or elminate one exhaust, and creat a new 3-4 inch exhaust system.
my 2 cents, and a few other mods will probably be needed.