Does anyone have rear mud flaps on their truck? I'm looking for the exact dimensions, pictures, and mounting details if possible please. I'm going to make some form old belt material with a metal frame, or have some made out of metal. I have 2 bolts on the bottom of the rear wheel well, but it looks like they have to be a certain shape to fit flat. My truck is an 84 Sierra long bed. Thanks for any and all help.