bds used to be called big dicks suspension but now its just bds. I have the longer rear leaf springs 56'' but i think they have the 52'' also. the lift i bought was for the newer style truck 73-80 something but it fit just fine the guy told me that the front leafs would be too long but they fit good for me. i went with bds because they have a warranty that says if anything breaks they will replace it. no matter where i break it if im off roading or anything. that doesnt include shocks and bushings and stuff just the actual hardware. you can go to there website at
www.bds-suspension.com