There is a big difference in the mounting/lift systems for the
older larger 47 and 59 snowblowers than the quickhitch
47 snowblower. The 47 and 59 with the gearcase were
used on tractors like the 755-955, and the 59 mounted on
the 4200-current mid frame tractors. They also used similar
units on commercial front mowers, but those units needed a
different gearcase due to reverse PTO direction of the front
mowers.
I would think the 2520 has what it needs to run the 59, it's just
going to be a bit of fitup to get it to work, and get all of the drivelines
figured out.
(I believe the front pto driveshaft for the 3120-3720 tractors is
the same as for the 2520)
You can look into the parts diagrams of the 59 on the larger frame
tractors and see the new 3pt hitch for the front of those tractors..
or look back at older versions, and they had the old style front hitch.
good luck