I have a s-10 bastard pack in back. For the bastard pack you need to use the original main leaf from your Cherokee springs. You can then mix and match the original leaf springs from your cherokee with any other 2.5" wide leaf springs. I used leaf springs from an s-10 but any 2.5" wide leaf springs will work.
Depending on how you mix and match the leaf springs you can get different heights. When I originally did mine I got 3.5" but because of drive line vibrations I brought it down to 2".

 

Why wont they work??

 

The Silverado springs? They're too big... 3" wide and too long. Need 2.5" width. Also they'd probably be a pretty crappy ride

 

Alright. I read that Dakota lleafs work too