I like the ingenuity of some people.
The only observation I have concerns the height of the winch cable that will be under tension.
It looks to be at the height of the top link which might pull the tractor over.
Just feeding the cable unto the bottom side of the drum would make it much safer.
Dave M7040
One could also put a snatch block lower, below axle height, so the rearward pull is from that point vs from the drum. The feet are a good point as well - one could weld on a "dozer" bucket from an ATV across the legs to improve holding the tractor when pulling a heavy load - I know when I use my Jeep's winch to pull a heavy log, I always put a strap around a tree and hook it to the back of the Jeep because the brakes won't keep it from sliding.
I like that. Too bad there is not more information on fabrication and items used. Looks like using an open diff and simply unlocking/locking one axle at a time makes it work - I like the simplicity of that concept - wonder about the strength of the pull but I love the speed.