I have a Thickstun dual 1bbl intake, probably the best balanced of the ones I have seen. I have two 42mm Weber IDA based throttle bodies, running 1 34lb/hr injector in each throttle body. Based on an estimated 150hp max once the Edgy head goes on and the hot rod cam goes in, the injectors are probably a bit undersized for 150 hp but I realistically expect about 125hp, split the difference between stock HP and max HP seen with this head/cam combo. If it turns out I need more I can up the fuel pressure or buy bigger injectors.
I don't plan to implement constant barometric compensation at this time, I don't plan to drive it anywhere there is a significant elevation change any time soon, that's at least a 6 hour drive for me. Once it's running good I might add it in later, I don't want too many issues going on all at once.
I will put in the LC2 wideband O2 sensor to provide feedback to the ECU when the dual exhaust is being built, going to put it in the merge collector.
Not real worried about the siamesed port issue either, my setup is essentially electronically adjustable carbs and the stock carb setup doesn't care about siamesed ports why would TBI? Port injection I can understand the issue, but I would probably adjust injector flow ratings to compensate, essentially a bigger injector in the siamesed ports with a smaller injector for the single ports or possibly a dual fuel delivery setup that will allow you to adjust fuel pressure for the siamesed ports separate from the single ports. If you are doing batch fire it probably doesn't even matter. Using EGT sensors on each exhaust port would tell the tale there or a Colortune setup