rear leafs 68 barracuda

certain mopar performance springs call for a special relocating/centering front spring hanger. it is bolt in and re-centers the axle/tire. with a new or re-arched spring, it can move the center line too. when i first got new springs back in '84 i made lowering blocks. car was way too high in the back for me. took 10 years to "settle in".