November 2023 update on the design of brackets: These no longer require a hitch receiver. The rear bracket holds the shackle higher up and has a small support brakcet that goes underneath the frame and supports the bottom of the rear brack. I have not  updated my pictures yet to show this. The forward bracket is unchanged. 

These spring brackets are designed to mount onto Ford F250 4wd highboy trucks and allow you to install 2017+ Super Duty leaf springs. You can use oem used SD leaves but really Skyjacker FR173S leaves are the way to go. Those leaves with no lift block put the rear of your highboy at factory height. For a 2005+ SD axle converted highboy with oem used front coils, my preference is to use 1" lift blocks with FR173S leaves to have the rear end raised slightly higher than the front.
 
Skyjacker FR173S are a great all around spring. Good ride quality without any weight in the bed and plenty of towing and hauling capability. OEM used 2017 springs have a large degree of variance in ride quality and load capacity.
 
Here is the neat thing about these spring brackets: Every bracket uses at least one factory drilled frame hole. You don't even need a tape measure to mount these in. You do need to drill a grand total of eight 7/16" holes in your frame. The brackets work as a template for the drilling location.
 
This can be used with your original Dana 60, a new super duty axle etc. Either way you do need to cut your factory perches and weld new perches meant for a 3" wide spring.
 
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 is the best bet but oem 2017+ work too
No lift block will get you about oem height with FR173S, but blocks can be addd as needed
Axle leaf spring perches for 3" leaves and axle tube diameter
Leaf Spring plate for 3" leaves and axle tube diameter
Leaf Spring Shackles for 2008-new Super Duty. Cheap ebay ones are fine.
U Bolts- 5/8",  width matched to axle tube diameter. No lift block = about a 9" U bolt so add your block to that. A 10" long U bolt is good for most applications.
7/16" Drill bits for bracket mounting