W2 Head Flow Numbers - Need Advice

Here's what he gave me. 173 [email protected] and [email protected]. That's at 25". He said that the heads are ported but it didn't look like much to him. He says he can still see the casting lines in the exhaust ports so that should be a tell tale sign right there. He feels that there's more that could be done, but he does not know the sweet spots to hit and doesn't want to make them into door stops either. So he recommended to send them somewhere to someone who knows the heads and the right way to port them. I just feel like I'm leaving something on the table if I leave the heads alone.

My goal is a 600 hp motor that can dip me into the 10's if possible. Or low 11's would be good too. I don't want to get all caught up in the numbers, but if there's gain to be had, I'd like to check into it. The flow numbers he's getting just don't seem up to par numbers for my goal.