Here is some flow data I have:

Head & Valve Size/Valve Lift> .200 .300 .400 .500 .600 .700
Stage III 2.08 Int. Unported 124 190 238 257 259 263
Stage I 2.08 Int. Mild Port 134.5 190.5 227 257 280 289

The Stage III head flow data is from an old Mopar Performance News article that Ray Barton had some flow numbers on Hemi heads and included the Stage III for reference. The Stage I is an average between two sets of heads I have. The orange one reportedly was ported by Lee Shephard from R&M, the other head by an unknown porter, most likely from the Austin, Texas area.

The heads flowed nearly the same at higher lifts, but as much as 8 cfm at low-to-mid lift. I used the stock valves in each head when I had them flowed and that was before freshening up the seats. Sort of a baseline number for each head.