there are several great posts about installing the preloaded Rancho front struts, but, I did find something useful while installing mine. It is much easier to take off the top three 15 mm nuts from the top with a socket on a long extension, before you jack up the truck.

 

I did the same. Simple tear down. Just not a full 2.5" of leveling as advertised ( which I will continue to gripe about ).

 

This could be why I'm only seeing a 1.5" and a 2" model now.

 

That's disappointing. Mine was 2.75"
edit: I also removed top nuts before jacking up. A 3/8" air ratchet with extension made it quick and easy