As for comparing engines at part throttle and lighter loads, if you had two similar weight A Bodies one stock /6 and the other with that tunnel ram 440, and both left a street light at the same time and accelerated to the speed limit at the same (normal driving) rate (side by side) both engines would be producing a similar power curve as each other, even the /6 would have a lot of power to spare, you would have to make ridiculously low amount of torque to be an issue.