Received the Ironman kit and went to install the other day and only had two shackles in the kit I had ordered all 4 and the 4 spring pins. The liquidating company said they would send the pins and shackles out without a problem, very nice to work with BTW. I have two shackles and 1 has a tab on the end of it and the other doesn't. How do I know if it is for the front or rear?? I don't know which shackles I need them to send me. The shackle that doesn't have the tab seems to have slightly more space between the two bolts. Any ideas??