that's not going to get you what you want. A substantial part of the sitting real estate is the space underneath the dash to fit your legs. If the seat was flipped 180°, you'd lose all that and the rear floor is even higher. Nobody could sit comfortably in that seat spun around except for a little kid.
A better modification for the front passenger seat is to modify the hinge so that the backrest can lay all the way down flat. Add a little padding to even it out & a camp pad on top & you've got an instant bed to take a nap or sleep on at night. Comes in real handy when driving really far & you just want to pull over & sleep without any hassle. Literally you can just turn off the engine & roll over into the passenger bed & conk out.