It's your truck, do what you like. You should be OK with careful parking and if the truck is mostly for show or cruise-in driving.
However, Mitch & Mike's suggestions will haunt you if someone in a parking lot backs up to touch you and touches the grill and not an extended bumper. Bumpers and even the bumper-to-grill shield are cheap compared to a nice (or even a not so nice) grill.
Tim
