i see..but let me ask this..
your the first person to actually give me a piece of information that helps me a little..thanks...i kinda understand..but let me see if i understand this right..(CID X 0.5 = intake runner volume) so my 350 X 0.5 = 175 irv.. but if i want more HP and torque at lower rpm's then i should look at a 170cc irv..is that right? but then also will the 5.700" p/m rods...is that the right length or would i need longer or shorter rods? or does that not matter that much? let me ask you this...why would someone suggest i get a 230cc head when i could get a 180cc head that has close to the same amount of cfm?