A fairly easy way to get your extra clearance (~1 1/2") is to take about 12-18" piece of 2" square thick wall tube and weld it to the top of your frame centered above the notch. It will just clear the bed. Plate it on both sides just like a weld on notch and cut the rest of your frame out. Once you do this your rear end will contact the center of the bed, so youll have to cut that too. And depending on how tall your tires are, theyll be scraping too-so, time to cut those out and move them up. Be sure and put the bump stops back in.