im pretty sure you can fit on a 295 on a 9-9.5" rim just make sure you dont ever run them to low on psi otherwise beads will start breaking and alot of problems will arise.
i got friends running 295/75/16 on a 16x8 rim so i dont see why you couldnt get away with it.
how does backspacing and offset work when trying to fit wheels onto the wk's? also whats the lug pattern? i might just give the gf my moto 951 b if they are the same lug pattern and get myself some new shoes