Prop shaft modification with MT75 box

[axle]

Hi All
I am in need of some advise on the above. The way the arrangement was with the donner car there were 3 UJ and the sliding spline in the middle, also the the rubber coupling donaught next to the gear box.

My question is the sliding spline still need to be there or the rubber coupling with one UJ would be suffice for the new set up.