I will get a flow sheet when I get them which will be few weeks. I believe they will flow in the 280 cfm range maybe a little more. You can see some Stage 3 flow numbers on his web site:
Under the "Price List" tab he describes what he does to the heads for each stage. All stages have a "competition valve job" performed on them. He told me that Stage 2 was the best bang for the buck because its just like Stage 3 except everything won't be all polished up and pretty. I am also getting them milled to 62 cc to get 10.3:1 compression with a FelPro 1008 .039" head gasket.
I am going to run a slightly longer duration cam then you and even at that Ryan does not think I should run a bigger carb. And I have asked him more then once about the carb size too. He is the expert so I will be going with what he says. The book "How to Build Big Inch Small Block Mopars" has an engine combo in there making 525 hp and it runs a 750 Holley.
Ryan also thinks the stock Eddie valve springs are good for the cam I am going to use but recommended I upgrade to chrome moly 10 degree retainers and locks for durability reasons.