Has anyone ported stock magnum heads and have the before and after flow numbers .???

As I remember, their OOTB state was pretty good. Better than OEM. However, not a huge gain margin, their ability to be ported out was pretty much what I’d call outstanding for a “Stock Replacement” cylinder head. The only better head in the same category was the MoPar Magnum R/T head. Capable of 300 cfm.