Update: The level of oscillations on a 16V have been measured and I have decided on just a straight 80mm long manifold. Flanges will likely be 13mm each with three small 12mm thick trusses between the plates. I shall make a new model soon.

I decided to go with a straight manifold because it allows for a longer intake than tilted upright. I found out that those guys at T3 only tilted theirs up so that their vacuum fittings would clear the metal water line. My manifold won't have such a limitation and hence I don't need to down-grade my design as such.

I am also tempted to just make my own version of a 16V RWD outlet and that way I can keep my throttles the right way up. Mine wouldn't be cast but rather a machined base with a shrink fit steel pipe in the side angled forward.