Leaf Replacement Parts List

hey all -

I bought some 'new to me' leaf springs, but I'm having a tough time wrapping my head around a total list of parts that should be replaced/installed with the new leafs. They are a 5 leaf set up that were on a '68 'cuda restoration that never made it to the road. I'd like to do it right. To me that means safety and improving handling (poly graphite?).

Can anyone help point me in the right direction? My dart sport is a 75 w/ a 7.25 rear end. Do I need to replace EVERYTHING the springs touch? What do I need to get to install these? Thanks!

Parts List:
Leaf Springs
Shackles (P5249715?)