I used the first set you posted above Danzo on my white 69Z, with a reproduction front spoiler. The kit works fine, but I thought some of the holes on the spoiler were not spot on. I seemed a couple so everything would fit nice.
Looked good for about 4 months, when I hit my first high curb in a parking lot...lol
I got it tweaked back where it is suppose to go, and have grazed a few more things since, (steep drive ways). Good thing the reproduction spoilers are only $20.