An indirect answer: My Fords have like 7 gpm of flow and they are in the 30-40 hp window. Having attempted to use them for wood splitter functions was somewhat futile. By the time you get a cylinder large enough to have a 24" stroke for long logs you accidentally cut, and 4" or so in diameter to get the force you need [force = area of cylinder (ス diameter squared x 3.14) x hydraulic pressure, all in pounds per square inch] for "bustin the bigguns" you quickly eat up those gpms and it takes forever to do the job. Oh, the other problem is that your hose length involved is excessive as compared to a unitized splitter and length helps to increase cycle time.....add to the slow response.
If that's ok then I can't help you to locate a couple of access ports on that tractor for adding high pressure couplers and a hyd. control.
What I did was to take an old lawn mower, strip it down and made that my controller since I had to buy the cylinder and control anyway....that cost was a wash and the hoses were cheaper as they were much shorter. I bought a pump, reservoir tank and interconnects and put them on the mower.......Northern Tool carries all the parts and look around for good pricing therein.