Please school me!67-69 cuda

door locks on a 69 are at a different location, rear frame rails are different because of the gas tank strap on a 67. dash structures are different all 3 years, trunk pan on a 67 has no strap plates for the gas tank. tail lights are all different,i can on and on about the difference. how much in depth do you want to get? oh the bumpers are the same front and back for all three years and they will interchange front to back. mike.