Did a little intake work Tonite...

Some say you also need to tap a line between the two center cylinders....and doing just the rear intake lowers water pressure to the heads.

I wouldn't bother on a street driver...

Do you mean that the tubes from the rear of the manifold to the front would lower the temperature at the back of the heads?
Because if you have a 16 pound pressure cap on your radiator, your going to have 16 lb throughout the system I would think.