I ran a 4ft Bush Hog squealer on my Beaver for years. I changed the 3pt to Cat 1 from Cat 0. I used some aftermarket arms from Tractor Supply that were for a Ford 8N. I had to heat and bend the arms about half way to clear the tires and still attach to the Bush Hog.
I also had to have front weights on to when it was raised for transport. When mowing I had to keep an eye on the height and make small adjustments from time to time. The Beaver does not have position control.
Also had to keep an eye on the temperature and keep the radiator clean.
It mowed really good and I did a lot with that setup. In thick tall grass I would have to be in low 1st and take smaller bites. Sometimes I would have to raise the mower up to clear it’s throat.
The other thing is the mower will push the tractor when you try to stop because the PTO will drive the transmission. A overrun clutch on the PTO would have fixed that but I ran a lot of 8Ns that does the same thing. So I am use to that and always planed my stops and the way I approached mowing a field to minimize stopping.
So it can be done. Be careful and enjoy!