For the front, locate the spot welds:
Remove the steps:
Get some first aid because thin rusty metal bites when the bolt breaks (yes, my Tetanus shots are current, I -do- work with metal):
The bottom two spot welds were drilled from outside (easier to get to):
Mark cutting lines (14.5"), cutting right through the spot welds:
Weld a brace onto what will be the new front of the bed:
Cut along the cut lines, removing the 14.5" section. Pay attention to which side of the cut line you cut on:
Remove the front, and clean up the spot weld remnants on the flanges:
Shove the front half on to the shortened bed:
Bask in a fuzzy picture of accomplishment: