Mate, 10 - 12psi on the standard turbo is all the standard rods will take they will then start bending and warping into a simullar shape as a banana (go to a engine machinist or any reputable performance workshop and they will tell and show you), valves springs are quite an issue too. As for a completely standard internals and making 700kw is complete utter BullSh!t.
Was at my mechanic the other day, he had a brand new GT-P with a spun bearing and fudged piston and it only had a Herrod exhaust and intake and Tune, isnt that nice and isnt covered under warranty.
Ps the V8 is so f**ken huge in size it looks like a good anchor for a ship.