I just got off the phone with Jerry Arnold. He has a flow bench and will run them for $25 complete with printout!
He's located in Kalamazoo and is one of the most knowledgeable guys in racing. Arguably the best points racer in the country.
Do a google on him and you'll get lots of information.

I talked to him about my 69 engine (should a miracle happen so I can keep it) and he gave me lots of great tips.

I believe he would be a wealth of info. If someone wants to get a hold of him, let me know and I'll pass along his info.

He's pretty busy with getting his car ready for racing this season, but in the fall he takes on a lot of work as well...porting, engine building, etc. I think when I talked to him about doing my lt1 heads many years ago he was looking at around $350-$400 completed, assembled and flowed. And I would probably trust his work over anyone else I have seen so far..