holley street dominator plz help

thanks to all my motor is not stock by anymeans but i thought i heard that the single bore was a bad choice for it....if anyone is interested in it i will be putting up a thread as soon as i get a new one.....ive been looking at the air gap manifold for quite awhile http://www.summitracing.com/parts/edl-75763/overview/make/dodge
but if my motor has this cam do you think that is best
http://www.summitracing.com/parts/cca-20-212-2/overview/make/dodge