OK, that's just sexy!
I've googled this before with no luck. Here is as far as I've gotten.
They call it the "Intake manifold collector", and "Intake manifold". I will call it the upper and lower intake manifolds. Exact same idea that Ford built for the 5.0L over 20 years ago.
I found these pictures long ago but they don't tell me what the upper half looks like inside. I think these are the ones you were talking about. I just want to know how the two sides equalize. I want to find a dissected view of the upper half.
