I became a little curious when researching the PTO RPMs of older Wheel Horse, John Deere and Cub Cadets. I read that "Woods Equipment" fabricated the Wheel Horse D finishing mowers back in the 70's and maybe the 80's and these mowers were belt driven, and I'm guessing had large pulley that appeared to reduce the 2000 RPM to a more manageable/safe speed.
Mike Duwe from other forum (weekendfreedommachines.com) discovered that John Deere and Cub Cadet also had REAR PTOs with 2000 RPMs similar to the D Series Wheel Horses. Because of this, is it possible the John Deere 260 Finishing Mower and the Cub Cadet L42 Model 349 would fit the D Series Wheel Horse? I'm not sure of the rotation direction, spline and diameter differences between Wheel Horse and John Deere are, but this would make finding a D Series finishing mower slightly easier.
Woods
Wheel Horse
John Deere
Cub Cadet
Citations:
http://www.weekendfreedommachines.com/discus/messages/335/232953.html?1205075077
http://www.woodsequipment.com/default.aspx
Other Links:
http://www.weekendfreedommachines.com/discus/messages/335/139036.html