About 30 minutes, just make sure you don't try and do two sides at once, you are removing a main engine bolt on each side. Don't tighten any of the nuts and bolts up, until you have all three located. Its a total no-brainer, I used medium (blue) Loctite on all.
I have now mounted highway pegs mounted from some old parts lying around from previous bikes.
Not sure they are really in the right position for my 32" inseam, but haven't given them a long ride yet. Next weekend I'm hoping to put nearly 1000miles on if the weather cooperates.