He's had his front end apart so many times that it is easy for him. For someone who's doing it for the first time, expect 1-2 hours.

Kind of like the first time I installed a lift.... took me a good 7+ hours (and im very mechanically inclined and have a garage full of tools). Now I can install a complete lift in ~3 hrs taking my time. (4 hrs if its 110 degrees out... right Corey? lol)

Each time you do it you learn new tricks to make the next time easier, you know all the bolt sizes, which extensions to use, etc, etc.