2-links suck too
	What about Ladder Bars? From the perspective of a street-driven car, the basic problem is that the ladder bar design does not resolve for axle rotation, except in the vertical axis. Nothing against ladder bars, it's just that it's not an efficient method of suspension attachment for street cars. In their intended environment, a doorslammer drag car, ladder bars allow for a solid coupling and an easy determination of instant center. But as a street suspension, ladder bars are woefully inadequate. Visualize holding a door, like the front door of your house. In this visualization, you will be acting as the forward ladder bar mount. Orient the door so that you're holding the hinges; the door should be horizontal, held out away from you, and swinging, up and down, on the hinges. Now, visualize a wheel, one at each of the two outside corners opposite the hinges; the long edge of the door, opposite you, will be the rear axle. What we've done is to model a typical ladder bar suspension. To see how it works, visualize the door swinging up and down. As long as the door is pivoting on it's hinges, with no rotational forces involved, everything works great. Now, try moving the corners opposite you (The corners that we're calling "wheels") in different directions...one corner up, one corner down. See what happens? The door wants to rotate right out of your hands! This is precisely what happens when you turn a corner, or go up a driveway, in a ladder bar-equipped street car. Ouch! The design considerations necessary to resolve this problem include lengthening the bar, moving the front ladder bar mounting points closer together (triangulating), and using a large, soft bushing. Take a look underneath a mid-60's GM pickup ( or a Grand National stock car, for that matter...). Street rodders, look at the Pete & Jakes ladder bar design. All use long, triangulated bars with big bushings. The only ladder bar that even comes close is the Chassiswork's Pro Street bar, which doesn't use a triangulated design, but does use a urethane bushing. What's the bottom line? Obviously, ladder bars are very popular, likely because of the design's simplicity. The 4-link design is more complex, often requiring some engineering and fabrication. On the plus side, the 4-link is a superior method of axle control, especially in street cars, offers infinite adjustablility, and is the only way to get your hot rod really low. So...think about it first. Design your ride for safety and longevity; don't use race-car parts or designs in street cars unless you're sure that they'll live.