for those of you that have done an add a leaf...

i picked up a lift kit from AC with UCA's and a single add a leaf. i'm going to do the installation myself. i see with the spring pack it comes with a longer pin and spring, but not u-bolts.

my question is, will the single leaf require a longer u-bolt? i've heard that any time you take the u-bolt off that you should replace it - is this correct? are there any other parts that are required for the add a leaf?

thanks...