The runner radius' on the end runners are the same as the stock intake manifold are on the outside of it, but on the inside they are much different than one might think they are just from the outward appearance and are smoothed out straighter. Thats one of those hidden features i've made into it that you cant see externally. The port flanges are just attached to represent the feature and not the actual flanges that will be cast on them. And yes, an angle of some amount will be compensated for in the carb mounting surface.
