I put a MF 1246 on an L305. That's a 30 HP tractor. It JUST fit across the width, and it could have extended out a few inches more in the front. But it works excellent. It is a pretty stout loader, I think built by Woods.
Is your tractor equivalent to the B7100? If so, I would think it would be too heavy for your tractor. Woods makes a stout loader and, I think, heavier then the typical Kubota loader which I think was made by Koyker back then.
The loader control valve was a joystick made by Nimco. Valve made in Italy. No support in USA. Difficult to get a rebuild kit, even through Massey dealers. I finally found one and after a year it was leaking again. Decided to replace entire valve. Really works nice now!
Here's some pictures so you can see how it fit, and how the L305 compares to a B8200 side by side. The B8200 is a lot more tractor then the B7100, so the comparison is even greater.