I'm wondering how much faster my cvs are going to wear out if they are flexed all the time from the 2" leveler. Also how about the rear end? will 2" blocks require shims tocorrect driveline angles.

 

No, you wont face an unusually shorter CV joint life, or any premature driveline failure due to angle on either of these mods. Its not enough flex to make an impact on the life of these components. At least this is what I have experienced through the trucks I know with these lift mods. Go ahead and install them and enjoy.