stock honda cams are set up to be very emissions and mileage friendly. i.e. not power friendly. that is why they see decent gains from adj.cam gears. SVT cams are quite the opposite. pretty hot cam for a street car. at least from the factory anyways. they will more than suit anybodies needs on a force fed duratec.
as far as using a stand alone system i can't answer your question. my guess is the cam position sensor and crank position sensor are what tell the pcm when to supply a spark and what advance to use. i do not know the details on this though. and i know there there is quite a bit more involved than that as well.
