If you have a winch you could always come up with the derrick version. The box is the same as on the GS versions. The super structure pix I posted is for the Canadian GS body.
This is the general service body. The one type of superstructure is for the GS variants and the other type is for the derrick types.
The inside of the box on a derrick truck showing winch setup.
A side view without the tarps. These pix should help quite a bit there Max. I'll scan the parts lists and post them in the next day or two.
