Yeah its occurred to me that getting the 1-4 runners connected around the 2-3 will be interesting. If you didnt do it this way only 2 cylinders would get this theoretical pressure boost so you'd have to take half if not more off the boost percentage. I didnt plan on doing anything with the lower mani, it doesnt leave a lot of room to tune and work with like a custom steel tube runner design. Hopefully it works out good for you.