You provided me some measurements on my Victors: the stock head with the Edelbrock valve job was 276 cc; the same runner on the ported head along with the different valve job was 294. You said there was probably 20 cc of additional runner volume, less maybe 2 cc for the valve having been lowered some with the new seat config. And those heads are 325 at .500, 340+ at .600, and 350 at .700.