Me, 45 minutes, but, most of the time is jacking.
Clobber the ends with a 3 lb. hammer when you get nuts fully loose.They will pop off. Mark the nuts and ends with White Out, record how many turns in each to remove. Put on new ones Exact # of turns, reinstall, tighten locknuts.
You will still l need a FE alignment. But, if you're a cheapskate like me, don't get one unless U note odd tire wear, noise, bad handling, etc.