http://speedtalk.com/forum/download/file.php?id=14303&mode=viewBrad this is a pic you posted on speedtalk and definately helps illustrate my point about the advantage of a raised port when it comes to the short side. Port cross section is only one factor, when you have a big long stroke cylinder with lots of piston speed generated at mid to moderate crank RPM, the larger cross section (IMO at 490+ Ci) is far secondary to port shape / runner volume (yes 40 CC is bigger but it's not THAT BIG, certainly not for a 490+ cube motor (110+ cubes or 1.8Litres bigger than a 383 that a 240TF is not to big for) and maintaining closer to 100% VE above/past the Peak torque RPM. a good bit of that CC volume is naturally because the bigger port is also LONGER, longer runner length is generally good for torque anyway, so that alone is a bit of an "offset", if all else were equal.
Before truly deciding I would like to look at 440Pursuit's -1 Race heads on a flowbench, I still think bigger better port with small street cam is the way I'd go...especially if I have then readily in hand,
