My first /6 build is ...

Wrong. Yeah, it will. The Carter BBD 2bbl was standard equipment on top of that very manifold.
Ok just so i understand the carter two barrel was standard equiptment on two barrel /6's and should be fine with the 264s from comp, correct? now were did i get the fancy chrome v/c took a whole to find the receipt, it was on ebay from KMJ performance for 21 cdn. OH and before i forget Dan you sure are a dead ringer for my high school auto shop teacher from Edmonton ...