Good job Rob,

Smoothing out the sharp edges certainly will make a good bit of difference on both
inlet and exhaus side.
I agree peak flow figures are not all that usefull. However, the cvh head is difficult to get over the 165 cfm(28" depression and .450" lift) mark - even with large ground out ports. There are certain areas just below the valve that need reshaping.
One cannot discover this without the aid of a flowbench - or many years of blind trial and error building race engines. Instead of a flowbench to test the results of port reshaping one had to rely on dyno power or racetrack performance. For me I do not have years of building championship CVH engines to know where (other than initial common sense) to remove material (and where not to) so I choose the flowbench as a tool to do this.
Also careful examination of cross sectional flow velocities in the port and also exiting around the valve.

Cheers

Perry