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Are the new springs you are recommending a coil over conversion (eliminating the leaf springs), a coil addition to the stock leaf springs, or a custom set of leaf springs?


This is what is being recommended:

http://www.gearinstalls.com/dc.htm

I agree that new leaf springs are your best bet. I would suggest Old Man Emu springs, they ride great and bolt in place of the stockers.

To actually answer your original question though, I would say everything in moderation. I would use a slightly longer shackle (maybe 2" longer in total length), full length add-a-leaf, and a small block (no larger than 2") in that order.