I have RE adjustable upper and lower on my '92, stock height. The salesman I talked to when I ordered them didn't know if they would adjust down to stock length. but screwed all the way in, they were perfect. I was interested strictly in experimenting with handling, and since they have that spherical joint at the frame end, half of the deflection allowed by rubber bushings is gone. With literally half the lateral play gone from the front end, the Jeep is not so Jeepy! Almost all of the normal wander is gone. I had been experimenting with urethane bushings, and while they tightened up the handling, I didn't like the extra shimmy or bounce, as the energy of hitting a bump or other road event needed to go somewhere, and the hard bushings would store it, then release it. Think of a Superball. The RE arms have the spherical end, but at the axle end is a bushing of about stock compliance, offering good energy absorption. The only thing I've noticed is that you need stiff shocks, as a lot of the vertical stiction is gone, as the spherical joints, which offer excellent articulation, have virtually no friction in their vertical axis. This lends itself to a floppy feeling front end. I have Monroe Sensa Tracks on it, much better than the somewhat soft Bilsteins, and it behaves well enough. I'm going to experiment with stock uppers, and maybe come to a happy medium between ride and handling.
They have a flex joint on one end similar to an RE arm.
