I bought donor C30AMG, and with standart hardware and stage 1 chip get 282ps and 700nm on dyno. I`m planing swap engine in my G270.
Good turbo cost ~1000eur, AMG injectors 1000eur, HP fuel pump 200eur, better cooler 500..1000eur and many working hours.
C30AMG is cheapest option.
613 is good option, but its not straight fit, and its heavy.
G300TD(OM606.964) & 250GD(OM605.960)Trophy raid