My 4" skyjacker is coming to my house on tues. I plan to start install that afternoon, my stock shackles and bolts are pretty worn-(no bushings on two of the shackles.) Should I go ahead and drop the $165 for a set of 4 SOR anti-inversion shackles w/greasable pins to install with the lift? I remember woody saying its a good idea to add them with a lift after someone said their shackles kept inverting. Need to know cause I got to order the shackles today if I want them in time to keep from dragging out the install. Thanks in advance.