I'm replacing the shackles and bushings on the YJ and wanted to pass along this info that I ran into. I have Skyjacker Soft ride springs which I identified after I bought the Jeep, glad they have a label on the spring eyes with a P/N. Most shackle kits that come with bushings are the stock diameters for the frame and springs. I found out after I removed them that the springs are a different dia. so luckily Skyjacker sells bushing kits for the springs, some manufactures don't carry bushings after a few years. Also Skyjacker only ships ground and the companies that carry their parts, Summit, Jegs, 4Wheel warehouse, etc, don't carry parts like that in stock, they are direct shipped from Sky. I was lucky to get the sales MGR at Sky to ship them out 2nd day. Check your spring bushing sizes before you dive into the shackle pool!!! 