leaf springs question

[02gt350]

Hi guys, new to the forum. I dont have a Thunderbird but my father in law does and im trying to buy new leaf springs for him and am not sure what to buy. When you need new leaf springs on a 63, do you just need the springs or do i need to purchase more hardware such as bushings or Spring shackle bushings? Any info would be appreciated.

is this all i need here
http://www.jcwhitney.com/autoparts/P...wflag-1#review