I bought the LMC stone deflector (pictured in the thread mentioned above) and it fits my '71 (all the bolt holes lines up), but I don't have the parklight assemblies to check fitment, yet... (My local shop had them back ordered) , but according to this:
http://fordification.com/tech/interchan ... ance_panel
The valance that LMC sells as a 67-72, will look strange with the year appropriate park light assemblies for my '71...as I said, I don't have the ParkLight Assemblies to actually check, but I can tell you from my research, it does look like the later models, need a different part, also you have to drill your own holes for the park light assemblies in LMC's lower valance/stone deflector...
That being said, I believe that the piece that LMC sells, would be for your truck, and while it technically fits the '71, it's not the right part... The correct NOS part for '71 will also have park light mounting holes that I don't think your truck's lights will need...