There is enough adjustment in the stock keys to level out the truck. You shouldn't need new keys.
I did the 1.25" shackle lift in the back and added new Bilstein shocks with bar pin eliminators (couldn't find correct length shocks with bar pin). So far, I haven't had an issue with the brake lines, although they were pretty tight with the swaybar disco'd.
Here's the thread with all the info on my upgrades.
http://www.elcovaforums.com/forums/s...ick+disconnect