However 2wld4u, How fast you use that tourqe is dependant on the gearing!!!! If diesel mack's put 2.73's or taller in they would haul ***** too (not atrociously, but for most serious street apps, tourque was always where it's at. that's what i was taught) after all 500 lb/ft of rotational force is still torque, apply it to taller gears and you use that power to make it turn faster.
doesn't matter how fast the runner can run if the legs cant' take the weight of the runner, what good is speed.!!