A
real lift??
C'mon! It's the only lift I have to choose from for my 4 wheel Independant Suspension. Don't knock me fer it!
On to your question...
If you install a lift at around 6" you shouldn't have too much to worry about. Make sure your angles are correct for the rear.
The biggest problem arises out of the poor choice of backspaciong some choose when they lift their trucks, regardless of brand or how the wheel is located and suspended.
Wide wheels that stick out the sides create a lot of unecessary stress on components and cause premature failure.
What size tires are you trying to run?