A cross flow head would not necessarily be better.

Mike is close to 400 SCFM w/his head now.
The new ZO6 Corvette head CNC ported from the factory flows 360-380 CFM. 505 HP
I need to look that up again to make sure on the Z06 heads.
Now these heads has GM engineers & designers all working together to put out the best head possible.
Think about how much money & time spent to get these flow numbers.
TWO cents......

12 port SDS EFI