Ok, bit the bullet and made a quick decision. Just bought a Gt35r near new condition, that really escalated quick but now I can sleep.
Why I said I want to either max out the injector or afm or turbo was because either one of them will max out at 500rwhp
On the pic: 7 Blade GT3076r, Gt3582r (yay!) and blitz kkk450r