tapper

any way to get this 7/8s shaft to work? I have a bushing but shaft seem short for drive ?

I bought a Predator to replace the gx200 on my baja warrior. I didnt realize til I got it out of the box that the Pred has a inward taper that you would screw something into. While the gx200 has a protruding thread that you have to screw the castle nut on to. Now, my question is, how do I...