I think it's a pretty good design. Once the air gets past the TB, it goes from tall and skinny, to short and wide. It looks like the air is just going to change shape, and the velocity isn't going to change. If anything, there might be a LITTLE bit of low pressure on the cyl 3 and 6 if the air jumps over those two ports. Maybe put a small dent in the top to channel some air down toward 3&6. You will definately need to test flow all 6 ports to make sure you have balanced air delivery. Rather tricky. Good luck!
