There are two versions of this bracket- one that is am OEM replacement, and a version with larger diameter spring eyelet holes that are spaced further down and further forward to accommodate 99-04 Super Duty leaf springs. Please note that these brackets are only compatible with oem 1970's and earlier front axles regardless of which springs you use. The later leaf spring axles have a wider distance spring to spring.
 
These brackets are made of heavy 1/4" steel and formed on a press brake, with minimal welding.
 
This SD version works very well with Pro Comp lift springs. 22210 will give a 3" lift. 22410 will give a 4 to 5" lift. 22610 will give about a 7" lift. Factory height 1999 to 2004 SD springs will keep your highboy right at its factory height +/- 1".
 
Factory style U bolts work fine. Dorman 35663 is a great upgrade to a 5/8" U bolt. 
 
Your factory shackles will work with pro comp lift springs and of course original springs. If you use a factory height SD leaf spring, you will likely want shackles that are about 1" longer than factory. These are sold separate.