Truck was lowered in the front with van LCA's. For the rear we're initially going to keep it simple with lowering shackles.

We started with a set of Superior Automotive #13-4100 Lowering Shackles commonly found at O'Reilly's/Autozone - $40. They're a "universal" piece designed for several Chevy's and one late model Dodge. (#13-4200 is for a F150 and even longer).





The first issue is that they require 9/16" fasteners. while all of the related bolts on our D100 are 1/2".

Also, the replacement shackle bushing inner sleeve is a good 1/8" longer than the original, so it won't fit into the hanger without some persuasion.





We drilled out the holes in the hanger to 9/16" (for 1 new 9/16" nut/bolt on each side). Then, using a torch, we heated the hanger and spread it wider to accept the new shackle bushing. It still wouldn't quite fit in and remain square to the bushing so we simply ground each end of the bushing inner sleeve till it was nearly flush with the urethane bushing. Worked great.

The bolt holes in the other end of the shackle need to be properly reduced from 9/16" to 1/2" since that's what the leaf spring bushing requires.

We enlarged the shackle holes to 3/4" with a unibit and welded a 3/4" bushing/spacer (3/4" OD, 3/8" ID x 1/8") found at the hardware store into each hole and then drilled the ID of the spacer to 1/2". Worked perfectly.





Should be good for a 2+ inch drop in the tail. Still leave a slight forward rake.