There are four bolt that hold the back of the shaft to the rear that are 12 point.
The hardest part is swapping the slip yoke but if you have ever done a u joint its a pice of cake when the shaft is brand new, so the hardest part would be to rescue the slip joint from your old shaft.
I use a ball joint press (big c clamp looking thing) to pop the old u joint out.
If you have never done one it should still only take you an hour or so depending how much you have to wrestle to get your old slip yoke off.
I probably spent more time putting the car on stands, putting the car in neutral to rotate the shaft until I could get access to a bolt, putting the car in park to torque the bolt, then putting it in neutral to spin the tires until the next bolt was easily accessible and repeat till done.
I think the only other mod I have done that was that easy was my accufab TB and plenum.
Even my sequential tail lights were harder LOL