Here is a pic of the original porsche prototype intake manifold for the 2.5. This engine orginally made 250 HP out of 2.5 liters, not bad at all.
Anyway, I like the dual plenum, single throttle body, this is very similar to all the new porsche intake manifolds.
Also, remember, all new duratec 3.0 are stuck with the electronic TB, so it really needs to be single TB manifold.
If you do produce something like this, I WOULD BE VERY INTERSTED!