I'm looking to replace the bushings in the front shackle and leaf springs. I looked at ES's site and I need 4.2121 or 4.2131. 4.2121 is a Complete
Spring and Shackle Set for $60. 4.2121 is just the frame shackle bushings for $15.

That is a large price gap for just two other bushing(rears of front leaf springs), unless something else comes with it.

Or is the 4.2131 just for the little end of the shackle?

What does each kit come with?

Edit: Looks like the 4.2121 does both eyelets of the leaf spring and the shackle on both sides.