Renze
Elite Member
Ive seen these Polish loggers with their Zetor Super 50 (made between 1956-1968, 4.1 liter 50hp) tuned to 70hp, wheelie-ing logs out of the bush. 2 years ago they posted a video of the transmission rebuild of their 25.000hr plus tractor, and last week i found they keep modifying it: Home made winch with hydraulic ground anchor, 23.1-26 combine tires, an SW400 Leyland licensed engine out of a Polish Star 68 truck, braked front hubs of a Star 680 and 14.9r28 rear tires (on the front) of an Ursus C-360 for lower rolling resistance. No 4wd conversion even though there is a certain type of Star truck front axle that makes an easy conversion, but these guys only need front wheels to get into the forest: Dragging logs out is done on the rears only 
http://www.youtube.com/watch?v=tCcd5J-f1ZA
http://www.youtube.com/watch?v=tCcd5J-f1ZA