First of all, this is not a completely stock TJ. It is obviously a truly off-road capable build. I can tell by the size of the light bar.
Secondly, he apparently has gotten far more responses from people not interested in it, or he wouldn't have felt the need to put in the comment about comments.
After installing that abomination, you would probably need a 2" lift up front and a set of RE monotube shocks to level it out and prevent a nosedive while braking.