You should not have to replace the whole front clip. You would need to get the 68-72 headlamp bezels, grill, and eyebrows. The center grill support where the hood latch assy would need to be changed out also. I have 73 fenders on my 72, they are the same. You just have to drill a couple of new holes in the fender to mount the eyebrows correctly. I am putting a 73/74 radiator support in the 69 I am working on now. All of the holes are the same as far as attachment goes with a few extras for the 73 up because of the different grill attachment etc. I have owned a 73 and a 74 prev and now own a 69,70 and a 72. You will also have to get the bumper filler for the 68-72 and the correct bumper also. You will need to drill one new hole on each side of the subframe to attach the 68-72 front bumper. The hole closest to the front is ok, but the rear one for the bumper will have to be redrilled.