Currently massacring your intake with an angle grinder and assorted tools probably most often found in a torture chamber (my workshop) ... whatever genius it was who made the entrance to the runner considerably smaller than the combined cross-sectional areas of the ports should be publicly flogged. Instant several-hundred-hp down the drain. That's a no-no I just can't allow to happen...
PMSL at this comment mate, I am guessing that there is quite some work going into the intake then is there?
Any chance of a few pics of progress to see how it's all going at all please?