You can do it with stock dumps, hell 380rwkw is no problem.
I put trust dumps on, the result overlayed with a car on stockers = same.
Turbo's will be out of puff by 7500rpm so you won't need to be taking it any further than that.
As for boost, set-up dependant. 20-24psi however expect the -7s to trail off to around 18psi by 8000rpm as again, they are just small.
They are on that early anyway you don't need to keep the boot in till 8000rpm