Ride height

It will definitely be higher. And if you use a biased pair as they were intended to be used, (02 and 03?) I believe the right rear will be higher than the left. Some people use 2 of the same p/n to keep it level. You can replace the front leaf spring hangers with ones that have a higher spring mounting hole. A 1" higher hole will drop the rear bumper about 2". Is it AR engineering that sells those? You can also flip the front spring hangers upside down to drop the rear but you have to elongate the mounting holes because the studs in the hangers are asymmetrical so they don't get mounted upside down. :-) Personally I would never do that.