I had exactly the same problem when I fitted mine last week. I had to cut 2 1/2 inches out of the drop links and weld them back together. Got a good weld on there so they're nice and strong. My rear shocks also knock a bit. I've been in contact with the seller and he's agreed to send me another pair when I've had the faulty pair picked up. He also told me that the FK AK kits don't come with shortened drop links? I thought they did as that's what is shown in the pic.
Also, it looks like you have your rear spring adjusters on upside down?