Not difficult to install but,.... get a friend to help. And I'm not talking about your wife
. Eight bolts and removes the old box. I'm sure you know by now that it comes in two pieces. Bolt them together, and BTW you will need a torque wrench to correctly tension the pivot point. I took some advice from someone on this site that said they sat it on their truck tailgate and lifted from there. Good advice. We put in two bolts and pivoted from those two to put in the remaining bolts. The only thing from there is to adjust the hitch in your trailer to level your trailer if required. The only other thing you will need to do is adjust the block that keeps the sidewinder from pivoting. Instructions are very complete and we didn't have any problems.
You didn't ask how I liked it, but I will tell you, it is great. I've had it out twice now and really like to ability to not have to worry about trailer/cab contact.
The only drawback I have discovered, you have to be dead-on when you hitch up, but not impossible.... just difficult if you are on an angle.
Let me know if you have any other questions.