On my clifford intake I divided the ports.
I ran .060 aluminum welded down the center of the manifold & extended the .060 past the mateing flange of the manifold roughly 1/2".
So, roughly 1/2" of the aluminum goes into the cylinder head.
I do not have lump ports.
But I made my own lumps that goes to the roof of the intake ports,BTW they did help flow along w/better low end torque.
I never seen anyone make these.
I bet w/the lumps I made(that bolt to the top) along w/the bolt in lumps(that bolts to the bottom of the ports) it should really increase the air velocity.
