intake manifold help

I currently have a 12.5 to 1, 440ci, eddy rpm heads, with a quickfuel 850 double pumper and a weiand team g manifold. I need to replace the manifold, seems the previous owner installed this manifold made for a dominator, and installed an adaptor to put the carb on.
Im convinced this manifold is the wrong set up.
My cam specs are lift at valves, intake 563, exhaust 585. Duration, intake 300, exhaust 310.
I'm running a 4500 stall converter and 456 gears.
I need suggestions on what manifold to use.
I sure one of you guru's can make sense of all this and make a recomendation.