It cant be done on a flathead.By the time you make the combustion chamber small enough to get the high compression,your valves are so shrouded that there is no flow.What they are trying to acheave with good flow is good cylindar filling.Use a long duration cam,and an open head,with the long rod from ARC,so that you get a long dwell time with the piston at TDC and BDC,and then you will make power.