The hole is already there in the fender , so install the pin , put a gob of grease on the top of the pin and see where it hits? Then drill the hole, smaller at first then measure on the top of the hood so they are equal for and aft as well as side to side. Then when your happy make the hole as big as the scuff plate center hole, then install the scuff plate. You might need to put a pipe over the pin to "tweek it" to get everything symetrical. I did on my car.