Okay, quick question, I'm totally set on what lift kit I want, now, before I get it, since my truck is still lower than the rear, do I need a leveling kit so that the truck is still even when the lift is installed?
It is already leveled, but I do believe the spacer needs to be bigger.
8" BDS lift

 

What size level, how much difference, how much block, aal, whatever is in the rear?

With the 8" BDS, it's basically a 6" bumped up another 2", so you can't stick any more on it. So if it comes out unlevel, you'll need to take some off the rear.

 

The BDS lift does level the truck. I have the 8" lift on my 07 and truck sits totally level