I run my Victor/Dominator carb level (with the engine), not the ground. All race manifolds have level carb pads, for even distribution I would think. Sure it is tipped back a little, but it tips back farther, when I launch it! I wouldn't think there is much difference, I would just put 1/2" spacers on it and RUN IT myself.
That HR intake is preferred over the earlier version "D" I believe?
I think I have a 7* wedge spacer I never used, you would have to find a mate for it though... if you really wanted to do that. (again, I wouldn't).