Impossible though it may at first appear, here are the results of DV's efforts toward doing the finished porting on a set of UltrPro Machining 9 degree small block Chevy heads. Ultra Pro's CNC, 293 cc, 2.25 intake valve version goes to 440 cfm before 0.800 lift. Can DV match that. Guess you will have to watch this to find out!