Made this two piece for a neighbor's truck.
![](http://img.photobucket.com/albums/v33/Snowtoy/2012-07-13_19-12-53_292.jpg)
He wanted it to be bolt on, easy to remove for wheeling, and to be able to install them without getting muddy after a day of wheeling. I used two holes in the rear of the frame to bolt some mounts too, the two sections slide in, one from each sidem, and I used a hitch pin to secure them.
![](http://img.photobucket.com/albums/v33/Snowtoy/2012-07-13_19-13-11_457.jpg)
This is what I made for my flat bed,
![](http://img.photobucket.com/albums/v33/Snowtoy/100_1187.jpg)
If you are still running a bed, you could weld the square stock to the frame at an angle, so it would be easier to install/remove the mud flaps.