...just think about how fast you could be going, if you weren't pushing around 3,900 lbs. with the drag coeffecient of a mobile home in a tornado.

My S/C has a G.W. of 4,200 lbs. (without load or occupants). I'd have to be sliding (not rolling) down a glacier of ice with tailwind to be fast.

But, if your mods. make you happier with your truck. So be it. Perception is more important than reality anyway. Ignorance is bliss.