4 Link Suspension kits are a great way to build a strong rear suspension system that is adjustable for setup and easy to work on. Most heavy duty 4 links use adjustable coil over shocks that are easy to adjust and change springs on. 4 link kits are not as easy as ladder bars to set up, but they can be more versatile. For street use, a 4 link suspension gives good all around performance. Whatever you do, buy a 4 link that is heavy enough to withstand the power you’re going to put on it. Rod ends are the most critical failure point because they take a lot of stress.