Just in case anyone does a search looking for this kind of information. The depth available from the begining of the hole where the parking lights are, to the metal panel directly behind is just a tad less then 5"

If you cut open the plate, you'll get maybe 6 1/2 to 7 inches to the wheel wells.

I mismeasured my diameter of the parking light openings, the slight plastic lip that the parking lights hook on to will have to be trimmed away, need that quarter of an inch. crap.

Joe, thanks for the tip

Hotsauce, most excellent. Are you mounting them against the cladding, or are you using a metal brace onto the chassis?