Need a Max Wedge Intake for my 500" motor making 690HP on the dyno.

The intake on there is the Indy 440-2B Dual Plane that has been ported. My engine builder seemed to think that I had 50HP I left on the table not going to an Indy Single Plane. I can't use the Single Plane since I want everything to fit under a stock hood.

Now, there is a new option....the Modman intake. Does anyone know the height differences from the dual plane? Does anyone think I will realize an improvement over the dual plane?

Motor is 505" with a smaller roller cam, ported 440-1's, pump gas. Carb right now is a single 850. Mainly for the street/occasional strip.

Interested in people's ideas and thoughts.