Thinking of a pto front winch off the crank pulley, thinking of using a cut up axle to turn the drive through 90 degrees and have a brake and some decent bearings to put a drum on, gearing it down so its not ridiculously fast shouldn't be too difficult, I just need some sort of a clutch to engage/disengage, i was thinking a simple hydraulic system, a big lever in the cab with an ordinary master cylinder operating a normally off clutch.