you might be able to do one extruded fuel rail section per carb, and then just have one connection back onto the AN fitting coming out of the carb base.
Would be easier, but due to the staggered nature, and the inclination angle, the left and right bank of injectors interfere with each-other, and cannot use such a profile.
Due to this angle i'm getting a very low profile package though, which is what i'm after, but i'm kind of forced to plumb to each injector individualy.
Thinking about an aluminium cover plate over the injector package when all is done to hide everything even better. But that would be cherry on top.