HVH Super sucker?

Hi guys! Finally got my Ultra XP 850 dialed in as close as I can get it. Mostly thanks to all the suggestions I got from you all. But I checked all my plugs today and I have a couple that look rich. My Super Victor has been deep ported and I'm wondering if a Super Sucker might even out the flow. I have 1/2 inch clearance to spare.

The rich plugs are #4 and #5.

The one I was looking at extends 1/2 inch into the plenum and a half inch above the intake. Heard some pretty good things about these but pretty pricey if it doesn't help me.

Enlighten me boys!