Tim, the splash apron attaches to the back of the bumper brackets and to the bumper itself (center), using the bumper bolts. Unless you have somthing drastically wrong with the front end of your truck, there should be no problem whatsoever with clearance between the splash panel and the grille,and fenders.
My truck has fought me every step of the way during reconstructions EXCEPT for the bumpers and the splash panel.
Good luck!
