Noticed bad upper ball joint when diagnosing bad u joint. So while I'm in there figured now is the time to upgrade brakes. As far as I can tell I may be able to just use the WJ wheel bearing which will change my front wheel bolt pattern but make doing brake jobs easier or I can drill rotors and keep XJ wheel bearings. Am I right so far? If that's true then Id be smart to buy a spacer that converts the rear to 5x5. If I decide on the spacer is that going to screw up the laser guided alignment machine that my XJ will find its self on when this is all done?