Originally Posted by twiley
What I have found so far they may be a 1 1/2" x 4" shelled bushing but can not find anything close. The sd springs are for the later chassis with the v10. Thanks for the response and help.
There are very few 4" options.
If you can find a local to you company like the following they can make up new springs for you and have it use a bushing that is still manufactured. The original ford ones are no longer available.
If you don't have a company like this locally it couldn't hurt to try calling them.
Also here are two more links that may help better find an options that would work.
Link 1: https://www.truckspring.com/suspensi.../bushings.aspx
Link 2 (similar as before but with pictures): Replacement Leaf Spring Bushings - Stengel Bros Inc.