Ok....Here we go...
There are three different trunk lock rod covers. One for 1970, one for 1971 (very similar and will interchange) Then there is a trunk lock rod cover for 1972 -1974 Which is the same all three years, but will NOT fit 1970-71.
There are two different trunk lock rods. One for 1970-1971 Then there is a trunk lock rod for 1972 -1974 Which is the same all three years, but will NOT fit 1970-71. The later one (72-74) is shorter.
The levers and clips on the rods are the same all five years.
The trunk lock cylinders are the same from 1970- early1973. Late 1973 and 1974 are different and will not fit the other years.