Not 100% sure on the cross member, might be ok. I think you have the skills and experience to get around that though. :dance:
Shift hole in KE1X's is even further forward than a 30-55, so you'r still going to have to do some trimming there.
Tailshaft spline is also smaller, so you'll have to swap the uni and the end of the tailshaft. Should be able to use your leftovers from the wagon to do this if you still have them.