Someone correct me if I'm wrong (which is more frequent as I continue to get older), but I was under the impression that those Kadrons were "Plenum based" carbs, meaning that they expect to have the intake manifolds connected together via an "Equalizer tube", or 3/8" - 1/2" diameter hose running between them. To that end, the combined manifolds will provide adequate vacuum pressure ("that big Suckin' Sound", according to Ross Perot) to drive a vacuum advance distributor. Non-plenum based carbs (Webers and Dellorto's come to mind) don't have the equalizer tube and a single manifold can't provide a large enough or "smooth" (pulse free) vacuum signal to drive the disti's advance diaphragm, so folks started using the centrifugal advance versions.
Whew! Having typed all that, I don't see any particular reason for swapping out a perfectly good, centrifugal advance, 009 distributor for a vacuum advance type. They both do the same thing, and I personally believe that the centrifugal advance is just as good, if not better, if it's in good shape. Many are also separately adjustable for idle advance and maximum advance and where that max advance begins to "come on" in the rpm band.
Stick with what you've got, and just plug the manifold's vacuum port for the distributor.
Gordon
"Dr. Sparks" in rainy Beaufort