OK, so here are the flow charts, and the chart LEGEND you see is as follows:

1) AP1 - these iron heads, 1st set of changes
2) AP2 - these iron heads, 2nd (and last) set of changes I described above
3) Ported 596- these are magazine article based, may have been a Dulcich porting articles, it's been a while though so I can't remember
4) Performer RPM - someone's flow numbers for these heads, out of the box
5) Ported W2 - someone's flow numbers for these hads, following porting work

My conclusion was:
1) you can improve on the INTAKE, but with stock heads the EXHAUST will hold you back a bit
2) the numbers themselves appear to be somewhat optimistic (peak flow), but down low these were pretty consistent with what others have seen, take a look at the feedback I got from our Moparts folks on my post HERE