A 6" lift with H.D springs will only require 6-7' u-bolts.
Any of the sponsors should be able to hook you up.
The All Sports Super Sport rear uses 2 u-bolts per side.
If you are running more than stock, this set up will do the trick.
You can order the u-bolts and the hardware from sponsors.
Stock motor should be fine with grade 5 u-bolt, again, sponsors.
