And just to add, in case someone is thinking about retrofitting....
It really appears, comparing the Tow Package and standard equipment and changes, the 7200 lb rating requires the HD cooling to handle the load....
The rear load leveling shocks, do next to nothing for distributing the load, in fact in some case it may distribute the load worse, not better.... ....the rear LL is just the convenience of keeping the body level..... .....you have to use hitch load distribution system over 5k lbs anyway....
Brakes, the difference between HD and SD is minor, pretty sure you get HD or SD based on what engine you got, not the tow package.... ....retrofitting HD bakes if you have SD is pretty easy and cheap, especially if you already need new rotors, you can how to's on this forum to do it....
The Mopar Hitch is the same as the factory, very easy to install.... ....remember, it being a Grp IV hitch means the hitch can handle the load, it doesn't magically raise the tow capacity of the rest of the vehicle.....
HD cooling radiator is easy, just replace the radiator, the HD radiator costs only a few dollars more than SD radiator....
The HD fan is the gotcha, its controlled totally different than the SD fan using a different wire harness, so I have no idea if retrofitting the HD is even possible or practical, definitely not if you want to keep the OEM wiring, more than $2k just for the wire harness's and one of the two is no longer available for some WK2's.... ....there is a module or solid state relay used to control the HD fan through PWM.... ....then this has to be connected the TIPM, which is going to be research project just to figure out how to connect it up, and then software configured for the fan to be controlled with PWM instead of relay control for the SD fan, which may not even be possible....