Will these leaf springs work

all I have is the leaf springs them selves. the mounting points are still on the 72 duster and trying to basically unbolt leafs in there. and put in leafs from a 74.

the car has some kind of crappy leaf spring setup in there. 7 leafs or so on 1 side 8 on another, don't know what their out of or from. ones im putting in are a stock replaces ment 5 spring