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They're at about 350 @ .550 OOTB.
Good numbers. The trick is to get within 10cfm peak but annihilate it from .0 to .300 lift. Get the air moving quicker earlier.
Big peaks don't impress me on flow sheets or dynos.
There are very few modern hemi shortblocks which can even imagine using that much air effectively.
Why do you think good flow from .000 to .300 lift is good?
area under the curve.....give me a head that flows [Email]250@.300"[/Email] and 350cfm max at .600" over a head that flows [Email]200@.300"[/Email] and 400cfm max at .600"
the 6.4L block is kind of a love child of a late model 5.7 and a 6.1, as it has most of the features of the 6.1, plus the different cam tunnel and MDS features of the Eagle headed VVT 5.7
Not many people understand that. 
NONE of these hemi's can use what a ported 6.4 can flow peak. Why not have just enough flow to be effective?
Efficiency over peak all day, everyday.
I'll stop talking now. 
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