As I said before, I'm not criticizing your ambitions, I just think you're vastly underestimating the complexity of a streetable ITB setup, but if the tuner magazines tell you it's easy, then go for it, I'll be waiting for results, just please be a man and let us know when you give up, I'll be sure to do the same and eat crow if you succeed.P.S. The BMW S50B30 was the first production engine to crack 100hp/L for road use in 1991. The Honda F22C/1 was 124hp/L in 2000. Ferarri only matched that output with the 4.5L F136F in 2010. None of the Maserati engines have hit that specific output yet so I'm not really sure you're making much of a point. All engines obey the same laws of physics last time I checked.
What does the fact that these engines have not cracked 100hp/liter have anything to do with what we've discussed?! ...and yeah, all engines obey the laws of physics, but that doesn't make them all the same, or even similar. Different displacements, component weights, valve sizes, compression ratios, cylinder orientation, combustion chamber design, head design, and a million other variables make huge differences is how you'll set up ITB, that's why there's so much development involved, but you seem too have it all figured out with your CAD drawings, so I trust it will be a quick and inexpensive process.
PS. The Honda F22C isn't the engine to which you're referring, that one wasn't built until 2004. The F20C is what you were thinking, again, you thought you knew this because you read it somewhere. I know because I have 3 F20C's one of which happens to be a 280 WHP NA ITB setup... Imagine that.