Chopping the bed floor, making a rolled over rear edge

[clay68c10]

Like a lot of others, I am cutting down my truck to a short bed.
Since it was totaled back in 2004 and the non-original long step bed was destroyed, I'm not worried about any kind of originality.

I got a fairly beat up long fleet bed for cheap, and am using just the floor. I thought about sectioning it, but all the rust is on the ends, so I decided to just cut it front and rear.