Originally posted by Contour39191:
Question do I need to place the little brackets underneath back on or is it ok to leave them off?

Go to home depot or lowe's or where ever and buy a piece of 1/8"thick by 1" wide steel strap and make a new support piece that is longer than the plastic one on the factory bumper. Just drill your holes and use the metal piece in it's place. I had to do this and the stock one isn't long enough as Micah stated and just the screws alone allowed the bumper to sorta sag at the very tip of the wheel well and look gappy. The steel piece is rigid enough to hold up the bumper nice and tight against the front quarter panel.