I built a center mounted winch into my 1957 Unimog flatbed. Perhaps some info would be of use to anyone wanting to do the same thing. The winch pulls double line rear or double/single line front. Either end is usable without moving cables or the winch. The bed was built with the winch system in mind. Cable route is direct run from rear turnaround sheave to the front. The front fairlead is two fairleads, one behind the other to allow pulling 90 deg to the side. Rear has 3 guide sheaves, ditto, or to allow both front and rear to be spooled at the same time (like stabilization while driving on a severe sideslope, or driving along the cable when anchored on both ends.
The pictures span 10 years so the paint changes, as does the dirt. The winch works great and has been used many times (Pierce 12,500 lb 24volt electric). The drum flat-spools itself by having the cable arrive at 90 degrees to centerline of the drum from a distant guide point.
The series of pictures are at Rocky Mountain Moggers (check out the trips section, too)
A good reason to mount a winch at the rear of the vehicle is weight distribution (even if the winch is not readily usable from the rear).
Pictures show a stuck from which the winch easily extracted the truck, and a shot on Tipover Challenge in Moab.
stuck front treffen.JPGTipOverChallengejpg.JPG
U-1300L Unimog with 10' Alaskan camper, OM-366A turbo-Diesel, fast axles, overdrive, Werner 12k winch
Various other mogs for work and play.