These spring brackets are designed to mount onto 1973-1979 Ford F350 2wd trucks and allow you to install 2017+ Super Duty leaf springs, and Skyjacker FR173S in particular. The forward brackets are self locating off off of oem rivet holes. The rearward brackes have a template that is position from oem holes.  Drilling a total of 14 new holes with a 7/16 drill bit is required.

34" frames require cutting and welding perches on the axle. This is most F350s.
 
2017 Super Duty leaf springs are a massive 65" eyelet to eyelet. The ride quality with these springs are just amazing for how heavy duty they are. They ride like a decent F250 spring and carry weight like an F350 spring. The oem 2017+ springs had a good amount of variance in weight capacity and ride quality, so I consider Skyjacker FR173S the only way to go.
 
This listing includes all four brackets, enough to swap out both of your rear springs for super duty springs. 16 new 7/16" grade 8 bolts and all metal lock nuts are included.
 
 
You will need to separately purchase these things:
-Rear 2017+ Super Duty leaf springs, Skyjacker FR173S in particular
-Leaf Spring plate- the 2017 super duty trucks have the U bolt pointed downward but you can mount U bolts in the traditional upward fashion with a basic 3/8" thick steel plate that I sell
-Leaf Spring Shackles for rear of leaf spring. These brackets are specifcally designed to accept 2008-2016 rear shackles, which are cheaper and easier to source.
-U Bolts- upgrade to 5/8"! (see Superlift 11604 for example, but the length depends on your lift blocks) no lift block = about a 9" U bolt. longer is ok too. 
-Pair of 5/8" x 5" bolts/lock nuts and 7/8" x 5" bolts/lock nuts to mount springs to thee brackets
-7/16" Drill bit