I see some do this, but it would it would be merely for aesthetic reasons with no actual functionality. The camper if on a flat bed would already be up high enough that departure angle would have no effect. Personally I would rather have the storage space, which you would need for batteries if attempting to run an AC from batts.You could reduce some rear overhang in the cabover model. Since there will be a dedicated sleeping area, the dinette doesn't have to be so big. Perhaps eliminate the back portion of the U-shaped dinette and chop a foot or two off the overall length in the rear.