Actually according to Direct motion they can get the heads out to 225 runners they say and that's what they say they will flow 308 CFM, but again it's just advertising i think.
I've got a set of Bodix 10's FP RP, and with 2.140 tit intakes and the flow #'s only say 314 CFM at .700 and that's fully hand ported. I don't know who ported them because i bought them with valves used. I will be finding out if the 10's work because they are going a 434 that's going in my malibu this winter with 2 7/16" hilborn stacks on alky.
Zip.