This truck here is a great example. This 461ci (bored 40 over) truck makes 495ft lbs at 2500 rpm and 550ft lbs at 3500 rpm. The motor never drops below 400ft lbs period. Did i mention its still running factory "peanut" port heads. The power comes from a RV cam, a dual plane intake and aftermarket headers. Thats it!! And it has over 460 horses to back it up. The owner pulls farm animals and equipment like its a daily walk in the park.