Good advice from Huntingdog above.
I've read you should never reuse u-bolts but I've seen it done.
One more thing; have the shop install bronze bushings in the springs so you can use "wet bolts", ie, bolts with zerk fitting so you can grease them. You'll probably find the stock plastic bushings are gone anyway. I installed the next size up U-Bolts (thicker) which required me to drill out the spring plates slightly.
I would also recommend a heavy duty equalizer and heavy duty (thicker) shackle links. Not much more money while your doing the work
Go to the Dexter Axle website and you can read all about this stuff.
