So, I really wanted to get rid of the side markers and chop the rear all in one shot.
Theres a couple ways out there with small variations, but no one details how its done, and the one pic I was going by was in a build thread where the owner had a shop do it, so again, no details, just one pic.
I wanted to keep the inner bodyline in the bed factory, so I'm going to copy this.
I also needed to make sure it was flat all across the area I was cutting.
I made the last pic for a friend