I would use the kubota loader. It was engineered for the tractor. Also,for the bush hog loader, if you look at the spec sheet it is rated for 1875 psi@6 GPM. the BX only has 1778-1849 psi at 3.1 gpm. (actual pump gpm is a shade over 6 gpm, however it uses a flow priority valve to feed the steering and pto clutch cutting implement flow to just over 3 gpm) So, attaining those specs is not within the tractor's capability.
Hope this helps,
Dave