I don't post often, but y'alls comments had me cracked up. if your asking these simple questions and want to put a fully custom 14 bolt in the front of your xj, then boy have you got some homework to do! I'm assuming your thinking they make factory 14 bolt front axles? Your looking at allot of money just in making the front axle. you say your planning for the future, but anything less than 44's and your gonna drag that hogs head on Just about anything. search the forums, I doubt there's three xjs around with a 14 bolt front end. go with a 60, upgraded shafts, big u joints, and you'll do just fine. only people I've really seen with 14 bolt fronts are the rock bouncers, and they're running 700hp+ and 44+ tires.