lots of differences but nothing major , exhaust mount in the trunk will be on the right on a 318 , left on a slant 6 , probably a 7 1/4 diff , different suspension although sway bars were optional , K frame is totally different , bigger V* had torque boxes , skid plates to protect the oil pan , r/t had 11x3" drums or disc , 6 would have smaller 10" front drums , everything can be changed