Tubular UCAs

Because of the way the torsion bar suspension works, if you increase the size of the torsion bars you're also increasing the preload. So, by going with larger torsion bars you're losing some ability to lower the car. Now, from a theory standpoint, with the larger bars you can have less travel without bottoming the suspension. The problem is that you may not be able to reduce the amount of travel as much because of the larger bar.

Think of it this way. If you install 1" torsion bars and set your adjusters exactly as they are right now, your car will sit higher in the front. In order to get it back to where it is now, you'll have to use more of the adjustment on the adjusting bolts. That will eventually lead to you not being able to lower the car as much. With 1" bars it shouldn't be a big issue, but with larger bars it can become a problem. With the 1.12" bars I have on my Challenger, even with the adjusters completely backed off, my car wouldn't sit down as far as I wanted it, which is why I have drop spindles. But again, this shouldn't be a big problem because the 1" bars shouldn't rob that much range from your adjusters.

As far as the UCA's, it depends on which type you get. There are tubular UCA's that use bushed ends (FFI, Just Suspension, Magnumforce), they adjust with the camber bolts just like your current UCA's. There are also tubular UCA's that use rod ends (RMS, Hotchkis, Magnumforce, CAP). These have to be adjusted off of the car, and I'm not aware of any that come with generic numbers for set up, including the Hotckis UCA's (I have a set to go on my Challenger). When I set up the CAP uca's that are currently on my Challenger I made 3 trips to the alignment shop to get the rod ends set up right. My alignment shop wouldn't mess with taking the suspension on and off, so I just used their numbers to dial in the adjustment until they could set it with the camber bolts. The only exception to this is Magnumforce's double adjustable UCA's (magnumforce has 3 different designs), which can be adjusted on the car.