love it so far. though I highly suggest checking out a few pictures of MJs with the vents removed. they all look... odd. also, don't forget to add a vent back in somewhere. those aren't just for looks!
the Liberty 8.25 is a couple inches wider than the dana 35.
the AW4 is a proven transmission. it's not quite as efficient as a more modern trans, but that just means you add more gear or more HP to compensate. unless you're hitting the tracks and setting 1/4 mile times, you'll never notice the difference.