curently have bravo one, what is needed to swap the drive with an xr drive

do i need a larger shaft input

The red dot gimbal bearing ( it's thinner, allows
the use of the longer u-joint assy)

They also have trim cylinder spacers to limit
max tilt height, but that wont prevent you from installing
the drive to the bell housing.

Depending on what year transom assembly you have you may need a gimble bearing kit mentioned earlier..