[Dumpling]

I have seen an intake such as you envision.

It was for a SBF, was a crossram, with the injectors mounted on the underside of the runners.

The fuel rail was one length, with the injectors mounted on each side as needed.

That means if you took the fuel rail and stood it on end, there would be alternating injectors sticking out from each side.

The machining obviously would take an expert.

I also believe that there was not just an access plate under the runners, but full access to the runners from below (the spider mounted to a valley plate adapter.

You might consider a TB system, with the injectors mounted to the throttle bodies. That would more closely mimic a standard carb 'look' if you don't want injectors and the fuel rails showing.