So, heres my improvement on the front leaf spring shackle.
on the right is the original, inside the frame rail piece which will be re purposed as the outside the frame rail piece.
next on the right, you see a high strength, oil impregnated bushing that will be installed into the hole in the frame.
next is the original lower (through the leaf spring bushing) stud which will be reused and pressed into the "new" outside the frame rail piece.
Next is the new shoulder bolt that will go inside the bushing in the frame.
and finally is the new (made by me) inside the frame rail piece with 1/2" size hole for the new shoulder bolt threads end.
Heres the bushing in the frame after some time in the freezer and some lithium grease and a little pounding.
A nice healthy greasing..........
and installed..........
The shoulder bolt and bushing come from Mcmaster.com, here are the part numbers....
bushing 6381k6 (it comes 3" long, you'll have to cut off .2")
shoulder bolt 91259a807 (It has a perfect length with using a .1" thick washer in the outside.)