I'm putting the Cognito 7" lift on my 2008 along with some 35" tires. I suspect that an 8" ball mount drop will be needed. Since my truck came with a 2.5" receiver I should be able to order some of the recommendations listed here: http://www.dieselplace.com/forum/showthread.php?t=67519&highlight=ballmount+drop

So the question is: will the 8" drop typically be enough or will I have to go to a longer drop? I will be installing some Airlift bags after the lift kit is installed and will also have the Hellwig anti-sway bars on to help.