You might not know or need to know but the important bit is i bet Neil Roper knows. If not for your exact head, then the one he used to develop the port shapes on.

I bet he could quote you CDs, cross sectional areas, port velocities and where they are highest/lowest across the port and where the flow tends to exit the valve into the chamber. All things you need to know to develop a head properly and all things he will have used a flow bench for.