I've spent a lot of time working with Wilson over the years. There isn't 40hp in what your doing in those pics. Altering the plenum size and runner length may find 40hp over a stocker, but a barrel drum stuck in the plenum will not. I will capture some pics of mine when I have it apart next time.
I sold my JMF to fund my Evo3 manifold. My manifold cost more than two JMF manifolds. It looks stock, fits like stock, and performs better than the JMF on my setup. Manifolds are not one size fits all.