to get a locker front and rear and re-gear the stock sport axels with ARB air lockers your looking at roughly 3000-3500 bucks If you do front and rear lockers. if not then your closer to 2500. with just a rear locker. best price ive seen for the rubi take off is 4 grand. but youll need to add wiring and the aux switches for the lockers with the mopar aux switch relay kit is 350ish at quadratech.com so you gotta add that cost to.... all for 1.5" wider axle and the slightly larger brake system. just keep that in mind. i decided to just go with a re-gear on my sport to 4.10s and add a single rear ARB locker come up in the near future. I did install all rubi take off wheels and tires with the rubi suspension so i figure id go to stock rubi gearing and the air locker. ill be install all the air components myself prior to getting a shop to do the gearing and locker install as i dont have the proper gauge to install that stuff. good luck!