I'm not a head porter, and I do not have a flow bench, but have seen a lot of info from professionals. Your looking at probably 220 - 225 cfm on a well prepped stock head with a good valve grind, and probably 265 - 270 on the Eddy's at your max. lift

Not sure why you would choose an open chamber aftermarket head when for the same or less money you could get a closed chamber head, and get both a bump in compression ratio while also getting good quench distance.