I tried both, the view where u can only see wheels when i move it back you can only see the 4 wheels lol, and the cockpit when i move back the man just stretches lol o-o
Use a custom view or the default cockpit view to drive with.
Shift-U mode is for taking photographs of the action, gettting the view where you want it for things like helicopter pov shots and sideline camera snapshots. Also it's used for designing/making layouts in the licenced version of LFS. You can also play LFS as an FPS game in this mode =)