Taking some measurements today on my Beast.
18" to the bottom of the bumper. 10"to the lowest point of the front suspension(by the wheel) 8" under the rear diff. 12" under the frame rails.16.5" under the body.
So I am going to put a 8" air dam under the front bumper, then I want to "boatside" the body to frame
then a full belly pan. In that order