You
do know what they say about ASSuming, right? You are correct though.
It's relatively easy to do; leave the trackbar unconnected and set the Jeep on the ground. It really helps to have level ground and similar air pressure in all tires, too. Turn the steering wheel side-to-side a few times and you'll definitely notice the hoodline moving in ways you normally don't like to see...it may also help to have that big friend bounce the bumper a few times to move things around. What you're doing at this point is making sure that the axle is fee to move about under the Jeep before pinning it in place.
Center the axle under the Jeep, using flares and straight body panels for reference if they're available at all. The steering wheel is probably going to be pointed to the side a bit - don't worry about that. Once the axle is in the right place, adjust the length of the trackbar accordingly to fit it in place. Torque to spec, align the Jeep, and have a nice day...