Half shafts use the same joint. I did all of mine on my GTS and I would allow 4 to 6 hours depending on skill and equipment. This isn't rocket science, but it is some work. You have to pull the lower mount off the shock loose to get the half shafts out, and of course on the drive shaft you have to get the car in the air to do that. Just some collateral business. A good 8mm socket is imperative for those pesky screws that hold the straps tight.
I used a cheapo hydraulic press instead of a vise to work the cups. Using sockets of course.