i don't think so, i think it has to do with the angle of the intake manifold in relation to the header. The manifold doesn't go into a full 90 degree angle, its more like a 60 degree angle (best guess). There are a few things that go in between the manifold and the head which pushes out the manifold a little bit so it does get a little close to the firewall. The Itb's dont bend much, they are almost straight as you can see from this picture......
So with the ITB adapter, the throttle bodies, the velocity stacks that go on the itb's, and then the plenum, there is no room at all for it unless you cut out the firewall.
