Yeah, that's kind how I see it too, especially on a big cube motor there's probably more power potential from taking advantage of the larger plenum manifolds available than from the port opening itself.

The larger plenum and manifold runners would likely help the torque peak hang on a little longer in the powerband with no real downside at all.

The indy EZ is kind of the opposite of what scenario of we're talking about here in that it takes a raised port larger runner MW and necks it down in the head in order to fit a standard 906 B/RB manifold.

Back when that Head was introduced there were very few MW manifolds available.