yeah, the wheelbase in the rear is hollow, unlike the front where there is already a place to mount it, I believe, where there are 4 screws holding it in. As far as I can tell just gotta take the screws out and drill/screw in the mudflaps up front. I won't have time until this weekend to get a better look, but yeah it looks like it's gonna take some creativity to get these puppies on the rear wheelbase. I'm not sure why FORD doesn't have model specific instructions - annoying.
~ Shadowfax ~