[mustangmelish]

just go get some pushpins from autozone or a place like that. i used those because if my chin gets hit, the pushpins will just break and the chin will drop. with screws, it could rip the bumper. and if the pushpins break you can just replace them instead of having to buy a new chin.
but its really easy. just line up the chin where you want it and drill the holes in the bumper, then slap the screws or pushpins in