Carb cfm with ported heads?

RAMM said
A 410 with box stock Edelbrocks is going to be sub 450HP. Refer to that EngineMasters episode here if you wish. A bigger carb is not the answer here but then again you are not asking the right question. Reading through the thread you would be well served by a 650-not joking. I have flowed them @ 20.4" H20 and they flow right @ 704-708 cfm. You are not pulling NEAR that @ max RPM @ max HP. Considering your gears again I say 650. I'm sure this will ruffle some feathers-J.Rob

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Funny thing is Blueprint built almost exactly my engine. Same heads, cam, intake, SCR (10.1:1), oil pan, etc...except theirs was 10 years later.
Moper was one of the people who helped me spec it out back in 2006.
It was estimated back then that the combo would make about 410-425hp.

Thanks J. Rob!