That cam isn't that radical. I agree with previous that you should check cam timing. A good 2800-3000 stall should be plenty in a 440. Is your intake a dual plane? If not lose it and get a dual plane. Remember basically stock 440's don't make power over 5000-5500. There torque monsters down low. A bone stock 440 with 3;23's should roast the tires off.