It's my understanding [from reading many posts], when measuring from the center of star on axle to fender lip with engine off the rear will be about 1" lower than the front. When engine is started, rear will rise to very close to height of front. And the variance from side to side should be no more than 1/2 in.

There's a thread discussing the ride height with a variety of reported measurements. I have yet to see the "factory spec" ride height.