xjbuddy

so not too long ago i got a set of RE fixed lowers and adj. uppers that came off a wrecked XJ with 4.5" lift. my rig is fitted with a RC 4.5" kit with .75" shackle and spacer. id like to replace the lowers and uppers with the ones i got. im running stock uppers now. i know the lowers will work fine but i need a general idea as to how long to make the uppers to keep everything inline and not have the front end out of whack. if anyone can help with some measurements would be greatly appreciated.