There are a bezillion reasons, including driving technique. Without the endless list, how can anyone even start to suggest solutions?
My first thing in the can would be the intake. Even the dual plane one (if you want to call it a dual plane) I cannot see how the thing can provide low end torque.
You condemn all Edelbrock intakes now? I can show you some low end torque with an Edelbrock intake. That's right!
