i picked up the side scoops and i went ahead and picked up an R model valance as well. i measured the back lip on the scoops and found if i stayed at 5/8 of an inch from the outer edge the pop rivets will all hit . i drilled the holes in the quarter first . then i held the scoop in place and with a angle drill i carefully drilled into the lip of the scoop through the holes i drilled in the quarter,it would help to have some one to hold the scoop in place .just don't run the bit in your buddies hand he may not help you againi drilled one hole first ,then i ran a sheet metal screw in to the scoop just snug enough to hold it in place. i then drilled the rest one at a time and screwed in each screw to make sure the scoop did not move .they fit very nice. now i can remove them and sand ,paint and buff with out ripping them off the car. the scoops will be pop riveted on after painting with stainless rivets with 1/8 inch washers slipped over the pop rivet inside the scoop ,they will not pull off. it is ready to come off the rotisserie but i think i am going to spray bed liner in the floor and trunk like i did on my 69 first.