To clarify. I am going to build a 440. I have a stroker kit to make it 493. JE dome pistons will have CR around 12.5 :1. Looking to produce IN THE RANGE of 675 TQ and 650 HP.
Therefore; 440 x 6200rpm x .0009785/ 8 = 334 cfm
Brodix; B1-BS - 2.20 intake @ 650 flows 295
Brodix; B1-MO - 2.30 intake @ 650 flows 382
Powerport 270; 2.19 intake @ 650 flows 347 cfm
440 SR; 2.19 intake @ 650 flows 360 cfm.
It did occur to me that you could have volume but that doesn't make it efficient. I have heard the B1-MO have a design that increases airspeed in to the cylinder. I do not have an understanding of the other heads (you know jack of all, master of none. Just enough knowledge to get into trouble). With the variances in CFM, relying on manufactures claims, technical aspects of heads, and my lack of experience, what head?