more problems then that putting an 83/4 in a F body. iso-strut B.S.,different shocks,cut the driveshaft,change the locating bolts in the springs,spring mounting plates,different u-bolts,spring hanger bolts that wring off in the frame.And you should mount the rear in the car with the spring perches loose so you can get the pinion angle right then tack weld them.-LOOK BEFORE YOU LEAP.