This is low boost like the kleeman, and without the drag of the S/C, so it should be similar power output of the Kleeman kit, maybe less going through the Variable Intake manifold.
I'm guessing with tuning and perfecting the whole kit, you could easily see 300 hp on stock engine with and 10.5:1 compression ratio, your gonna have to use the best gas available. Build a proper intake manifold to reduce any hesitation and correct airflow, it might be capable of putting 320 hp to the ground safely.

Then again, if we're to do this ourselves we might be able to get better pricing on mass purchases, but we will have to do our homework and have every aspect of this thing planned perfectly. Otherwise the Kleenman kit might be the best way to go, other than doing an engine swap from a 5.5 v8 benz.