There are also a few more small parts like the 1/4" plate welded to the bumper corner plates (spacers), some shearpins (DO NOT USE A BOLT!), and various hardware (trust me, you'll want to replace most of the fasteners if you get them with the parts). There are a few 1/2" and 5/8" bolts that are 11" long and expensive to get in grade 8. Plan on spending a Franklin on grade 8 hardware.
Make sure you ask for a multifuel PTO shaft if you have a multi. Gasser ones will require some grinding to make work on (some) multis. The Multi shafts are necked down to clear the bell-housing IIRC.
Also make sure you are not hitting any of the fuel lines near where they cross over behind the PTO input of the winch (near the IP).
Also, consider doing the seals and fluids on the winch *before* you put it on the truck...will save you a lot of effort later on. Way easy to do on a bench. Mike at OD Iron sells the kits. Same for the PTO itself...change the seals/boots while it's out (can't do it on the truck without draining the tranny, and it *will* leak if the seals are bad).
One thing I learned...the length of the studs used for attaching the PTO to the tranny is critical. They are short for a reason (clearance). You'll understand when you get it. When buying a PTO, see of you can get the studs with it, or get the proper length ones (someone will need to measure them, I don't remember off-hand) before trying to install it. I think they are 3/8" by 1.25"?
If you have all the parts and the fasteners handy, and ready to install, it could be done in a (full) day if you know what you are doing. Plan on two days and a few runs to the hardware store if this is your first time.
Hope that helps a bit....