| of the integration logistics. Producing a manifold with only a single throttlebody will pose issues with symmetry, or, convoluted intake pipe routing. Based on the sketches you have assembled, symmetry will be your biggest obstacle as the airflow appears to be more right-biased; meaning, the airflow from the right hand turbo will flow a shorter distance through your IC core as compared to the left, which will introduce intercooling bias - not something you really want. Additionally, it appears that your design is putting the throttlebody to the right of center of the engine, which will introduce issues with both symmetry and convoluted airflow paths. The airflow path entering cylinders # 2,4,&6 will have to make a very hard ~160-degree bend to match the intake runner angle of the lower plenum - this will compromise airflow into those cylinders and create cylinder-filling capacity bias. This is a design idea that I will get around to producing in the upcoming months after a few other projects are completed:
This is several different images of the components and in the upper left is the overlay of the vertical view. The grey region indicates the area that the intake manifold will reside in. There is an access panel on the top of the manifold to allow access to the fasteners as well as access to the velocity stacks. The lower image is a cross-sectional view of the cylinder heads and how the coil packs will sit into the head with new valve cover castings and simple modification of the coil pack itself.
There are no visual provisions for IACV, AAC or FICD, however, the plan is to put them along the back-right side of the manifold. The flanges at the front for the throttlebodies will have bolt patterns for the 60mm units and will have an internal bore of 60mm to match. The velocity stack section is planned to provide adjustment in runner length for further tunability. The idea of this manifold is very similar to what is done on naturally aspirated systems. It is common to use velocity stacks as a means to improve airflow into the runner (typically through a carburetor) and varying the lengths to attain the desired performance characteristics. In this case, it is a forced induction application so the external housing (the manifold itself) is serving to mimic an "atmosphere", but still implementing a velocity stack design for the runner. 
I dont mean to hijack your thread here - kudos for your creative attempts. I just think there are some things you might be overlooking that I wanted to point out to you that may be of help if you do decide to make a project of it.
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Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor.
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