update....... OEM shocks will work with the McGaughy's 4/6" lowering kit as long as you get the kit comes with shock extenders.
Just FYI, cuz I never thought to mention it till now.
When I was going through this process, I wanted to see just how low I could go, w/o serious fabrication and keep this all functional.. Even with the Kore inner cvs giving all that extra joint travel, I found you end up running out of up travel on the front struts anyway, This pic is the suspension collapsed, also the tires in this pic are shorter, this was taken when I had 305 50 20s on the truck, now with the 305 45 22s they would probly hit the fenders.
4/6 is the lowest you can get. At 4 inches front drop when I drop the front hard off my driveway it slightly hits the bump stops. But I have to try, for that to happen.. Every day driving though, your good.. since Sept 2011 I've had zero issues. And our roads around here aren't the best..
Like I said in pms. The Monroe dampening and the GF spring rate compliment each other nicely. I really think you'll like the ride and stability..