i would't run nos directly to each port because it seems that it would be hard to regulate the fuel to nos mixture since the carb in the middle of the manifold. if you were to get a tripple set up way cool! it would be better. i am no expert but it just seems logical to have the two as close as possible to one another. if you are going to the trouble to direct spray why not just inject it? just my 2 cents.
