I am relatively sure that is not a dominator flange intake in your photo, looks like one of the polished ones that sells on Ebay.
Also, you may want to check the rules of posting in the parts for sale section, you are not supposed to be putting 12 items on the list at one time, they are to be grouped together so everyone doesn't get into a "bumping" war.
That's just the style of this manifold. I bought this for a dominator years ago. Mistakenly ordered a short deck rather than a tall deck manifold. Kept it in case I ever built a short deck motor but don't see that happening, so that's why I'm selling it.