Not that the GT350 has been confirmed to include a flat-plane crank I'd like to learn more about it. The two main purposes for using such a design is to lighten the rotating mass and improve breathing. A FPC uses a lighter crank which allows the engine to rev up faster. The firing order allows a better flow from the exhaust ports. One negative is they typically have less torque. The GT350 will either have a 8,000 or 8,250 RPM rev limit depending on how you interpret this comment:
"The new Ford spins to a heady 8000 rpm before fuel cut-off, according to Nair, and has another 250 rpm of safe headroom. This from mildly oversquare 94 x 92.7-mm bore and stroke dimensions."
More can be read at the links below. Post up any insight or questions you may have.
http://articles.sae.org/13709/
https://www.youtube.com/watch?feature=player_detailpage&v=2AzrOPPZFzs
http://www.projectm71.com/Cross_FlatPlane.htm
"The new Ford spins to a heady 8000 rpm before fuel cut-off, according to Nair, and has another 250 rpm of safe headroom. This from mildly oversquare 94 x 92.7-mm bore and stroke dimensions."
More can be read at the links below. Post up any insight or questions you may have.
http://articles.sae.org/13709/
https://www.youtube.com/watch?feature=player_detailpage&v=2AzrOPPZFzs
http://www.projectm71.com/Cross_FlatPlane.htm