I believe the consensus is the front spoilers were delivered in the trunk then installed at the dealership. They were mounted where ever the prep guy put them.
Re: 71 Roadrunner chin spoiler placement - 03/21/0901:59 AM
Plumbad, yours look well placed... Pretty much identical to mine. I can't take credit for it though. A previous owner installed them. I almost decided to remove them when I had the car painted... Glad I didn't.