I've bought 3 sets of those very same LCA's. Wheel hop = gone. Launches are definitely better. As you are not adjusting the height of the car, there should be no need to use an UCA because the pinion angle of the drive shaft is not changing one bit. That being said, I've also lowered every car that I've done LCA's on to varying degrees, have never gotten any vibration nor have I gotten the pinion angle out of spec.
07 GT500 - magnaflow muffler deletes, JLT CF Big Air, Bama 91 tune, Eibach Sportlines
07 GT 'vert Whipple SC, full suspension, killer sound system to make you go deaf