One of the most important things is engine fit. Once that’s under control, the rest is easy.
I made a custom engine mount for my WF to move the motor out by the width of the clutch. Wish that such a mount were commercially available…
A lot of shops will charge $$$ to move the right seat mount inwards and some people cut off those tube and mount a rear-bar strut. IMO both of these are weak solutions but other people are making them work… <shrug>
And one more thing – OIL OIL OIL!!! WF failures are EXPENSIVE!