You guys are not understanding. It's not about higher or lower, it's about having the window sill and the top of the bed PARALLEL, like railroad tracks, only sideways. If you laid an angle finder on that image that you have posted and got the angle of the cab window sill and the angle of the top of the bed, they would not be the same angle. If you tilt the front of the bed up a little, or the rear of the bed down a little, then the window sill and the bed would be PARALLEL and would have FAR better eyeball than they do now. I must be mis-explaining this, maybe some of you other guys can help me out.
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