71-73 front spoiler

Well it's almost time to put the front spoiler on my 73 Mach 1 but I've run into a problem. When I bought the spoiler it came with mounting instructions but they are for a 69-70. So now I don't know where or how to mount the spoiler. I've seen it mounted differently on every car I've looked at. Does anybody have an instruction sheet or anything lying around that they could post up here? Any advice or help is appreciated.

Thanks in advance,
Kyle