As I continue to ponder on this idea, I come to think of a turbocharged version. On the torque side of the head, run low boost on a small hot side for a quick spool time. On the HP side of the motor, run high flow/boost and a larger hot side for your top end. Since your two intake manifolds are not connected, this eliminates crossing air flow and pressure from the two turbos.
You would also run twice the injectors giving you a greater ability to tune the engine. It's almost like running two completely different cylinder head and intake setups at the same time, just timed differently throughout your RPM's.