Half of the rear notch is tacked in place. I just didn't like the looks of how the frame rail has that factory sweep outward and the Porterbuilt 24 X 15 kit is obviously tucked in for wheel clearance. A few installs that I've seen online, just angled the transition pieces back in toward the notches. So visually you still see the slight bulge outward then tucking back in, I wanted a more natural look, like the notch was meant to be there. Not an afterthought...
So here's the misalignment before I tweaked it in.
After pie cutting the upper and lower flanges and moving the rail in.