This is from a different post.
Before you invest in a kit that may or may not fit your needs...be advised that your local trailer repair shop sells perches, u-bolts and mounting plates at a greatly reduced price. I purchased the entire setup to perch and secure a camaro diff for $20. That way you can add an ear for your shock mount where ever you need it. I've found that the generic kits are just that....generic, and usually wind up hanging on the wall. Just my $.02.....gained from....