Just an FYI that thing will be way out of wind before 6,000 RPM as it's advertised. That cam would be fine for a driver and will make good torque. You could certainly go a little bigger than that in a 440 and still have great street manners and drivability. Adding the RPM intake at the same time is a worthwhile expenditure and they'll compliment eachother.
RPM`S are great intakes, but I go along w/ a single plane for throttle body inj., my 8 injectors in my throttle body are spaced bigger than a dual plane opening. All the experts that I have read commenting on it say said the same .
