302 Head Question...

some times that wall ( small intake to large port) can be beneficial in causing a siphon affect for fuel drop out that runs down the manifold and then gets pulled back into the air stream.

I read a article, some years a go on Speed Talk, and read a thread about this. The porter for some race team, claimed that by have a .050 larger intake exit compared to the head entrance gave more torque with no top end loss.

NOTE: Test result my vary.:D

If i was going to put a smaller port, intake manifold on. I would grind the roof of the intake to match the head.....and leave the rest alone. If you have ever flowed a head with velocity probe. Then you know that's were all the air want to be any ways.:yawinkle: