On the Revo site they don't actually say anything about uprated internals, just clutch, RS4 injectors etc...
I've heard of a couple of people running GT30's on standard engines. Probably around 480bhp.
As for internals, I don't know what the rods are rated too power/torque wise. Something to look into though, an Edition 30 with DSG and a GT30 would be MENTAL!