In 1999 we did a 4" lift (Man-a-fre Safari) and shackle reversal at the time we used the anti-inversion shackles that came with the lift kit and it's been that way ever since. This weekend I was rotating tires and added a set of wheel spacers. I was looking at the way the shackle sits and it just doesn't look right to me. I searched and noticed the newer kits come with dog bone shackles and couldn't find any set up like mine. Would there be any benefit to changing shackles? or am I just over thinking things and have a case of tetanus from my rusty 40.